Category: 1c Trichocereus Species Q – Z

Trichocereus tarijensis / Echinopsis tarijensis

Trichocereus tarijensis / Echinopsis tarijensis

The species trichocereus tarijensis, also known as Echinopsis tarijensis or Trichocereus poco, is a columnar cactus. Today it is separated through various subspecies that all count as part of Trichoereus tarijensis.

Currently valid names

Echinopsis tarijensis +

Echinopsis tarijensis ssp. herzogiana / Trichocereus herzogianus

Echinopsis tarijensis ssp. tarijensis / Trichocereus tarijensis

Echinopsis tarijensis ssp. totorensis / Trichocereus totorensis

In addition the species Trichocereus poco / Echinopsis poco is seen as part of Trichocereus tarijensis as well.

Trichocereus tarijensis is a massive and spiny Trichocereus species. Its many forms make it difficult to clearly separate some regional forms, which is why the whole complex should rather be seen as a group of very similar regional forms that ll belong to the same species. It is partially synonymous with trichocereus totorensis, Trichocereus bertramianus and Trichocereus poco.

Type locality

The type locality is Tarija in Bolivia and it grows throughout southwest and south Bolivia, parts of Argentina and the Andes.

Synonyms:

Trichocereus Poco, Helianthocereus poco, Cereus tarijensis, Lobivia formosa ssp. tarijensis, Trichocereus herzogiana, Helianthocereus herzogiana, Helianthocereus tarijensis, Trichocereus totorensis, Helianthocereus totorensis, Trichocereus narvaecensis, Trichocereus narvaezensis, Trichocereus bertramianus, Echinopsis bertramiana, Echinopsis narvaecensis, Trichocereus orurensis, Echinopsis orurensis, etc.

Description of T.tarijensis

Typically, Trichocereus tarijensis has 15-25 ribs, can get up to 40 centimeters in diameter with spines that can get 1-10 centimeters long. Spines yellowish in color. 1-5 Middle thorns and up to 45 radial thorns. The spines are usually long and are pointing downwards, what gives Trichocereus tarijensis a great protection against anything trying to eat it. The diameter can reach a stunning 40-50 centimeters. Young specimens are very similar to Trichocereus pasacana, but are a lot more spiny, especially later on.

Flowers:

Red to pink to milky white and over 10 centimeters in lenght. Green fruits, up to 5 centimeters in lenght. 3 centimeters in diameter. There is great variation within the look of the flowers and while some can be more rose-colored, some others look more reddish.

And also the rest of the plant can be greatly variable, which is the reason that this species caused a lot of confusion due to numerous descriptions of plants that somehow seem to belong into the same complex. A lot of the species inside Backeberg´s genus “Helianthocereus” belong into the Tarijensis group, that now consists of a handful of subspecies, instead of varieties. That is a fine but very important difference and I tend to agree that this is exactly the right way to classify this group of impressive giants that can be found all over the Andes.

Photos of Echinopsis tarijensis

T.poco_2

Pic: Prier

Trichocereus poco Trichocereus tarijensis ssp. poco Echinopsis tarijensis 2

Trichocereus Tarijensis Poco350

Trichocereus poco Trichocereus tarijensis ssp. poco Echinopsis tarijensis 6

Trichocereus poco, which is probably synonymous with Tr. tarijensis

Trichocereus Tarijensis Poco352

Trichocereus Poco, which is probably synonymous with Trichocereus Tarijensis

This is a herbarium specimen, Copyright: Ben Kamm, Sacredsucculents.com

Trichocereus poco Trichocereus tarijensis ssp. poco Echinopsis tarijensis

Victorio_Angelelli_14Victorio_Angelelli

Trichocereus poco Trichocereus tarijensis ssp. poco Echinopsis tarijensis 12

Jujuy- by Marian ocecowski QuebradaDeHumahuacaEvasaco Jardin_Botanico_de_Altura-Tilcara-Jujuy

by Evasaco Jardin_Botanico_de_Altura-Tilcara-Jujuy

Trichocereus poco Trichocereus tarijensis ssp. poco Echinopsis tarijensis 14

Young specimen of Trichocereus poco, also known as Trichocereus tarijensis v. poco. You can perfectly see the similarity to Trichocereus Pasacana and Terscheckii. The plant is a lot more spiny though and that´s exactly how you can differentiate it.

Trichocereus Herzogianus ssp Totorensis367This plant was labeled Trichocereus Herzogianus ssp. Totorensis. It is also the same plant called Trichocereus Totorensis, Helianthocereus Totorensis or the new name Trichocereus Tarijensis ssp. Totorensis.

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Trichocereus validus

Trichocereus pachanoi

Trichocereus chiloensis

Trichocereus thelegonus / Echinopsis thelegona Friedrich & Rowley

Trichocereus thelegonus / Echinopsis thelegona Friedrich & Rowley

Trichocereus thelegonus, also known as Echinopsis thelegona, is a columnar Trichocereus species from Argentina.

Trichocereus thelegonus / Echinopsis thelegona Friedrich & Rowley 1
Pic: Noah Reams

Origin:

Argentina, Tucumán, Salta, 5500-1100 meters altitude

Synonyms:

Trichocereus thelegona, Trichocereus thelegonus, Echinopsis thelegonus, Echinopsis thelegona, Cereus thelegona, Cereus thelegonus

Trichocereus thelegonus is a branchy & creeping cactus that only produces a handful of shoots. It can reach a maximal height of approximately 2.2 meters and can get up to 10 centimeters in diameter. But that´s only the case on very old plants and most of them get 6 – 8 cm in diameter. The plant has 12-13 ribs and is characterized by its very dominant areoles that sit in top of some extremely hexagonal warts. It´s look is very typical and once you got used to the plant, it´s very hard to overlook or misidentify it.

Trichocerus thelegonus has rounded areoles and yellow to dark/brown spines. There also are regional types that rather have a reddish spine color instead of the brown one. Old growth tends to change its color to a more blackish tone, similar to how it can be observed on Trichocereus cuzcoensis. That said, both are really not very similar and this interesting plant from Argentina rather resembles a hanging basket cactus, than a classic columnar. Tr. thelegonus / Echinopsis thelegona usually has one and, in some very rare cases, two middle spines and between 5-8 radial spines that can reach up to 2,5 centimeters in length.

FLOWER:

Trichocereus thelegonus is a night flowering species, with flowers than can stay open until the early morning. The flower is white and gets up to 22 centimeters long and I measured a staggering 17 centimeters in diameter.
Apart from the size, the flower is very beautiful and has a wonderful scent!

Fruits:

The fruits of Trichocereus thelegonus are round and have reddish brown hairs. The fruits are reddish and can reach 6 centimeters in diameter. It does not produce as many seeds as other plants from the same genus. Trichocereus thelegonus / Echinopsis thelegona is self-sterile and it needs pollen from other plants to produce seed.

Trichocereus thelegonus cristata / crest:

There also is a crested clone of this plant that is extremely cool and resembles a monstrose Cereus. I´ve been lookingf or this crest for years, but wasn´t able to find one yet. Luckily, there are some pics from a Botanical garden:

Buy seeds or cuttings of Trichocereus thelegonus / For sale:

This species is kinda rare, but I sometimes get viable seeds of Trichocereus thelegonus. The problem isn´t that there aren´t any seeds available; but most of the ones that were, did not germinate. I am working on putting the type in my shop and if you want to be up to date about my fresh seeds, please subscribe to my newsletter at: trichocereus.net/newsletter.

 

Trichocereus thelegonus / Echinopsis thelegona Friedrich & Rowley by daderot Echinopsis_thelegona_(Washington_DC)Echinopsis Thelegona Cristata by Daderot

Trichocereus thelegonus / Echinopsis thelegona Friedrich & Rowley 3 Trichocereus thelegonus / Echinopsis thelegona Friedrich & Rowley 5by Emoke denes Echinopsis_thelegona

Trichocereus thelegonus / Echinopsis thelegona Friedrich & Rowley 7bernard loison Trichocereus thelegonus / Echinopsis thelegona Friedrich & Rowley

bernard loison Echinopsis_thelegona

by dick culbert Trichocereus thelegonus / Echinopsis thelegona Friedrich & Rowleyby Dick Cullbert

Echinopsis Thelegona Flower Trichocereus thelegonus / Echinopsis thelegona Friedrich & Rowley

Echinopsis thelegona kaktus cactus

Trichocereus Thelegonus Trichocereus thelegonus / Echinopsis thelegona Friedrich & RowleyPics: Noah Reams

Trichocereus thelegona samen

Echinopsis Thelegona Blüte Trichocereus thelegonus / Echinopsis thelegona Friedrich & Rowley

Trichocereu Thelegona Echinopsis Thelegona

Trichocereus thelegonus / Echinopsis thelegona Friedrich & Rowley Flower Bluete

Pics: Noah Reams

Trichocereus thelegonus Echinopsis thelegona spines

Trichocereus thelegonus / Echinopsis thelegona Friedrich & Rowley 222

If you liked this article, check out our Trichocereus database pages about Trichocereus peruvianus or Trichocereus bridgesii.

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Trichocereus werdermannianus / Echinopsis werdermanniana

Trichocereus werdermannianus / Echinopsis werdermanniana

Trichocereus werdermannianus, also known as Echinopsis werdermanniana, is a columnar Trichocereus species from Bolivia. It is a close relative of Trichocereus terscheckii and I consider it an intermediate species between the large Andean Trichoereus terscheckii and Trichocereus taquimbalensis.

Original name:

Trichocereus werdermannianus Backeberg & Knuth, Kaktus ABC

Trichocereus werdermannianus is an old name that is debatable because it is so genetically close to Trichocereus terscheckii and might as well be seen as a regional form of it. The plant was discovered and described by Curt Backeberg, who named it after the German Botanist Erich Werdermann.

Trichocereus werdermannianus is a species that is difficult to identify, and its similarity to Trichocereus terscheckii make it difficult to distinguish it from it.

Apart from T.werdermannianus being mislabeled as T. terscheckii, they are also often labeled as Trichocereus taquimbalensis or tacaquirensis. For example, there are a few seed & plant distributors that sell cacti labeled Trichocereus werdermannianus, and the plants we grew from them ended up being all kinds of species. Trichocereus werdermannianus was sold as Trichocereus terscheckii, Trichocereus taquimbalensis, Trichocereus pasacana, Trichocereus peruvianus and Trichocereus macrogonus.

A very constant trait in all Trichocereus werdermannianus plants is the dark green to blue gray green color of epidermis, that is very typical for this species. Most if not all specimens I ever saw had a very dark green epidermis and a spination that looks like a mix of Trichocereus taquimbalensis and Trichocereus terscheckii.

I included the Description from Backeberg´s Book below. Backeberg acknowledges Trichocereus werdermannianus´genetic proximity to Trichocereus terscheckii and Trichocereus validus, but mentions that its flowers usually emerge from the top of the plant, while the two species mentioned before would have flowers that appear at lower regions of the plants body. Based on these observations, we think that it should merely count as a form or variety of Trichocereus terscheckii. That is if we even go so far to split a species up based on such criteria.

Flowers of Trichocereus werdermannianus:

White, flowering from the apex, flowers similar to the flowers of E.terscheckii.

The trees reach a size of 5 meters and a maximum diameter of 65 centimeters. Young plants have 10+ ribs while adult specimens can have 14+ ribs. The plant has ten spines that are between 5 and 10 centimeters long, color between yellow and yellowish brown. Many flowers that arise around the apex of the plant. The flowers can get up to 22 centimeters long, but the whole complex is very variable in this regard. The fruit is up to 4 centimeters in diameter and has many white or black hairs.

Trichoecreus werdermannianus seeds

The seeds of this species are usually 1,4 mm large, but that is also influenced by other factors such as region, plants that grow in direct neighborhood.

Origin of E.werdermanniana:

Bolivia, the type location is in the Charcoma Valley east of Tupiza. However, the species is also present around Potosi. Backeberg suspected that Trichocereus taquimbalensis from the region around those aforementioned locations is actually Trichocereus werdermannianus. It is obviously related to Trichocereus taquimbalensis, but there are substantial differences between these two species.

The first Two Pictures are in Fact the plant that Backeberg understood as Trichocereus werdermannianus. Pictures from the unspeakable Thunderhorse! 😉 In Front on the lower left: True validus! Please note that some pics on this page actually show plants labeled Trichocereus werdermannianus, but get very close to Trichocereus taquimbalensis.  It´s probably not that easy to draw a firm line between these two species sometimes.

Trichocereus werdermannianus Echinopsis werdermanniana Trichocereus werdermannianus Echinopsis werdermanniana 2

Trichocereus werdermannianus Echinopsis werdermanniana Taquimbalensis

Trichocereus werdermannianus Echinopsis werdermanniana 77

Trichocereus werdermannianus Echinopsis werdermanniana KK1094 mutant

KK1094 Trichocereus werdermannianus Mutant

The three pics above show seedlings that were raised from KK1094 Trichocereus werdermannianus seed. Please note that those seedlings actually ended up being Trichocereus taquimbalensis var. wilkae instead
Knize used this number for two plants. First, Trichocereus giganteus and then Trichocereus werdermannianus. Maybe he wasn’t sure about the ID, called it Tr. giganteus and changed it to Tr. werdermannianus later on. Both plants are collected in Otavi, Bolivia. Giganteus at 3200 Meters and Werdermannianus at 3500m.  Pics: MUTANT.

I own a Trichocereus giganteus KK1094, which ended up being a completely typical Trichocereus werdermannianus.

Trichocereus giganteus KK1094 Trichocereus werdermannianus Echinopsis (2)Trichocereus giganteus KK1094 Trichocereus werdermannianus Echinopsis (2) 2Trichocereus giganteus KK1094 Trichocereus werdermannianus Echinopsis (3)Trichocereus giganteus KK1094 Trichocereus werdermannianus Echinopsis (24)

This is Trichocereus Werdermannianus KK917 from Karel Knize. Pic from Rodni Kisar!

Werdermannianus KK917

This One is Trichocereus werdermannianus in the Botanical Garden in Adelaide. Pic from ZED! Thank you Bro! The plant is very close to Trichocereus taquimbalensis.

Trichocereus werdermannianus Echinopsis werdermanniana Adelaide GusTrichocereus werdermannianus Echinopsis werdermanniana Adelaide Gus 2Trichocereus werdermannianus Echinopsis werdermanniana Adelaide Gus 4Trichocereus werdermannianus Echinopsis werdermanniana Adelaide Gus 6

Orignal description of Curt Backeberg in German:

Trichocereus werdermannianus Backb g. — Backeberg & Knuth, Kaktus-
ABC, 206, 412. 1935
Bis 5 m hoch; Stamm bis 1 m hoch und bis 60 cm ∅; Rippen ca. 10, später 14
und mehr, 2 cm hoch; Areolen 2,5 cm entfernt; St. am Jungtrieb ca. 10, mittlere

kaum unterschieden, bis 7 cm lang, gelblich bis bräunlichgelb bzw. hornfarbig;
Bl., wenn zahlreich vorhanden, ± kranzförmig um den Scheitel oder scheitelnah;
bis 20 cm lang; Gr. weiß, kaum die Staubb. überragend; N. 15—19; Fr. kugelig,
3,5 cm ∅, lange, aber nicht sehr zahlreiche schwarze und weiße Haare tragend;
S. 1,3 mm groß, mützenartig, rauh punktiert. — B o l i v i e n (von mir, als Typort,
im Charcoma-Tal, östlich von Tupiza gefunden, von Cardenas auch in den
trockenen interandinen Tälern der Departements Potosi und Chuquisaca, auf
ca. 2600 m Durchschnittshöhe der Vorkommen) (Abb. 1054—1055). Während Trichocereus validus und T. terscheckii seitlich ± weit herab blühen,
ist T. werdermannianus durch seine nur hochsitzenden Bl. eindeutig unterschieden.
Sie alle scheinen nach den viel längeren Bl. und der sich nie verändernden
Stachelbildung an den Spitzen großer Pflanzen echt trichocereoide Riesenformen
zu sein, die (zum Teil) auch nachts geöffnete Bl. zeigen, wie ich zumindest an zwei
Arten beobachtete.
„Trichocereus pasacana“ dagegen scheint die größten Formen der Helianthocereus-
Formengruppe zu bilden, mit kürzeren Bl., gedrungeneren Röhren und an
alten Exemplaren bzw. solchen an hohen Standorten mit borstenartig elastischen
St., wie sie den Hochlands-Helianthocereus-Arten eigentümlich sind. Ich habe
daher Trichocereus pasacana auch zu Helianthocereus gestellt. Er ist zudem Tagblüher, soweit bekannt.

Trichocereus werdermannianus / Echinopsis werdermanniana 33

Trichocereus werdermannianus

Trichocereus werdermannianus / Echinopsis werdermanniana 55

Trichocereus werdermannianus / Echinopsis werdermanniana Friedrich Ritter

Trichocereus werdermannianus / Echinopsis werdermanniana Pedro

Trichocereus werdermannianus / Echinopsis werdermanniana Pedro 3

Cactus AffinityTrichocereus werdermannianus / Echinopsis werdermanniana Tricho Nest 2

Trichocereus validus / Echinopsis valida

Trichocereus Validus Monv. aka Echinopsis Valida

Trichocereus validus, also known as Echinopsis valida, is a columnar cactus that´s closely related to Trichocereus terscheckii. I consider it a form, variety or subspecies of Echinopsis terscheckii. Which one´s exactly the case will have to be decided by DNA testing .

Synonyms:

Cereus validissimus, Echinopsis valida, Echinopsis validus, Echinopsis robbinsoniana, Cereus forbesii, Trichocereus forbesii, cereus forbesii, Echinopsis rhodotricha, Trichocereus rhodotricha, Trichocereus terscheckii, Trichocereus terscheckii

Trichocereus validus grows like a tree and can get up to 40 centimeters in diameter. It doesnt get quite as thick as Trichocereus terscheckii, which is a close relative of it. The origin of Trichocereus validus is not know, was but it was probably Bolivia. In Bolivia, there are various Andean Trichocereus species from the Trichocereus terscheckii complex that this species could have come from. There´s populations of Trichocereus werdermannianus and Trichocereus tacaquirensis, which are both very similar in appearance. My personal impression is that Trichocereus validus is just one particular type of Trichocereus terscheckii.

Ribs:

10-12. Older specimens have a higher rib count, which is pretty typical. There are very little spines around the upper half of the body, what makes it look like a nearly spineless version of Trichocereus terscheckii.

The areoles are 2,5 – 3,5 centimeters apart of each other. 5-10 radial spines that are up to 4 centimeters long with a very typical outwards pointing spine, which is actually the lowest on the areole. In addition, Trichocereus Validus has approximately 1-2 middle spines. 5-10 centimeters long.  Spines have a very small but visible rounded spine base. The spine color is yellow, similar to the one on Trichocereus Terscheckii.

Flower of Trichocereus validus:

White. Similar to Trichocereus terscheckii and between 10-15 centimeters long and up to 15 centimeters in diameter. Gray-brown hairs on the flower and white petals.

Fruit of T.validus:

Round fruit with wool & hairs on top of it.

The original description of Trichoecreus validus was written after a bad photo, and there was no flower photo or description originally. However, a flower description could be made eventually after a plant that grew in the Botanical Garden in De Cedres and the photos we saw did show a very close relative of Trichocereus terscheckii. While it has pretty unique spination, it´s still pretty obvious that the plant was some variety of Trichocereus terscheckii.

Sources for Seed & live cuttings of Trichocereus validus:

I am very proud that some of the members from our SAB forum were able to relocate this long lost plant in Australia and make it somewhat available. There were a few growers that received cuttings of this remarkable plant and we sometimes have cuttings available in our Trichocereus Facebook Group.

Another breeder who offers some seeds of Trichocereus validus is Misplant.net! He has a plant that roughly belongs to the same complex, but which isn´t quite the same mother plant to make a couple crosses every year and you can buy seed through his Seed store on Misplant! Misplant´s Trichocereus validus belongs somewhere in the relationship of it and Trichocereus uyupampensis, another rare Trichocereus that is considered (by some) to be synonymous with Trichocereus validus. Whether or not this is the case is currently not clear.

In Australia,  this plant was made available through the Fields Family and collection, who owned two large mother plants before the collection was donated to the Melbourne Botanical Garden.  In addition, you can get seeds of Trichocereus validus from Sacred Succulents but I haven’t seen their mother plant yet. I will add new sources for this plant in this article but at the moment, I do not know more.

Cultivation & frost tenderness of E.valida:

Trichocereus validus is very similar to Trichocereus terscheckii and everything I wrote about the cultivation of it applies here too. These large Andean giants can take slight night frosts, but it should not go over -5° to -7° Celsius or it will get dangerous. The plants need to be dry and the average minimum temperature should be around 10° Celsius during the cold winter months. Trichocereus validus is extremely thick and it needs a large, deep pot if you ever want to see it flowering.

Trichocereus validus Echinopsis valida Robbinsoniana Backeberg

trichocereus validus flower Echinopsis valida Robbinsoniana Backeberg

The Plant here was found on ebay and has many similarities to Trichocereus Validus. Chances are, it´s just some Terscheckii with a similar Spination. But since Trichocereus Validus is most likely nothing else than some Terscheckii Variety it´s not really possible to clear this up.

Trichocereus validus Echinopsis valida Terscheckii

Trichocereus validus Echinopsis valida Terscheckii 2

Trichocereus validus Echinopsis valida Terscheckii 3

Now the next Plant is really interesting. It is what many growers call the FIELDS Validus. It grows on a private property in Australia and the Owner originally bought some Seeds of Friedrich Ritters Collection of Trichocereus Validus and grow it out into a gigantic Monster of Awesomeness! The Plant is identical with the Plant shown in Backebergs Cactaceae and IS most likely the Terscheckii Variety that is known as Trichocereus Validus.

Trichocereus validus Echinopsis valida Terscheckii Fields

Rodni Kisar

This Plant grows in the Huntington Botanical Garden and is labeled Echinopsis Robinsoniana . It is actually the plant that came to fame as Trichocereus Validus. It´s probably a variety of Trichocereus Terscheckii and chances are that there are seeds labeled as that available on the market. So whenever you encounter Echinopsis Robinsoniana or Terscheckii varieties from Bolivia, it might be the plant that was once called Trichocereus Validus. I am beyond doubt that Trichocereus Validus didn´t suddenly cease to exist in cultivation but simply carries another label these days.

Echinopsis Robbinsoniana Trichocereus validus Echinopsis Robbinsoniana Trichocereus validus 3 Echinopsis Robbinsoniana Trichocereus validus 3Trichocereus validus – Huntington Botanical Garden – by Richard Hipp

Echinopsis robinsoniana Numen Nudum (Trichocereus validus)

This Plant is labelled Echinopsis robinsoniana and looks very much look the Trichocereus validus pictured in Backebergs CACTACEAE. Personally, I am absolutely sure that Echinopsis robinsoniana is just a synonym for Trichocereus validus. This plant grows in the Huntington Botanical Garden, but this species has not been found outside the Botanical Garden and most plants that are found in the wild are identified as Trichocereus terscheckii or one of its associated species. It is definitely possible to come across this plant on the botanical market, labeled as Trichocereus terscheckii, Trichocereus werdermannianus, trichocereus validus etc. There are countless forms and intermediates that belong to this complex and there is a great amount of variety within the large Andean Trichocereus species. Trichocereus pasacana is another closely related species.

Echinopsis Robinsoniana Trichocereus validus Echinopsis valida

Echinopsis Robinsoniana Trichocereus validus Echinopsis valida a

Echinopsis Robinsoniana Trichocereus validus Echinopsis valida c

Echinopsis Robinsoniana Trichocereus validus Echinopsis valida d

Echinopsis Robinsoniana Trichocereus validus Echinopsis valida 67

Trichocereus validus Echinopsis valida

Jordan Caleija

Trichocereus validus Echinopsis valida 2

Trichocereus validus Echinopsis valida 3 Fields

Trichocereus validus Echinopsis valida Trichocereus validus Echinopsis valida 55

Trichocereus validus Echinopsis valida 666

Trichocereus validus Echinopsis valida Fields

Rodni Kisar

The Garden Trichocereus validus Fields Echinopsis valida

The Fields Garden Validus, photo by Terrapin

Shed Validus Trichocereus validus Echinopsis valida Fields

The Fields Shed Validus, photo by Terrapin

If you want to buy some Trichocereus validus seeds, check out our shop

Trichocereus tarmaensis / Echinopsis tarmaensis

Trichocereus tarmaensis / Echinopsis tarmaensis

Trichocereus tarmaensis Rauh & Backeberg – Deser. Cact. Nov. 20. 1956

Trichocereus tarmaensis is a close relative of Trichocereus cuzcoensis that was described as a separate species. There are various differences between Trichocereus cuzcoensis and Trichocereus tarmaensis, and some forms of Trichocereus knuthianus are considered to be synonymous with Trichocereus tarmaensis as well.

Echinopsis tarmaensis Tarma Trichocereus tarmaensis

Trichocereus tarmaensis reaches a size of 2 meters and is pupping from the base. It has 7-9 ribs that are approximately 2 centimeters wide, rounded at the top and with very distinct V-notches above the areoles. The areoles are approx. 2-2,5 centimeters apart with a diameter of 9 millimeters. Young growth areoles have a very fine brown wool that changes it´s color to a darker brown. It has 3-6 radial spines that are between 1 and 3 cm long. It often has one very large downward pointing spine that is up to 10 centimeters long. The plant usually has one of those middle spines. Old spine growth changes its color very soon to a gray, similar to what we know from Trichocereus cuzcoensis.

Flower of E.tarmaensis:

White, very similar or identical to some of the spiny forms of Trichocereus cuzcoensis or  Trichocereus peruvianus. The tube has brown hairs and the fruit reaches a maximum diameter of 5 centimeters.

Type location:

Central peru, Tarma in Peru at around 3000 meters.

Trichocereus tarmaensis looks very similar to Trichocereus tulhyacensis and both species are hard to distinguish if do not have the luck to observe them during the flowering phase . The flower of Trichocereus tulhuyacensis is pink, which is something that does not apply to any other Trichocereus species from this complex. If your Trichocereus has a reddish to pink flower, it´s not Trichocereus tarmaensis but Trichocereus tulhuyacensis or another close relative. Both Trichocereus tarmaensis and Trichocereus tulhuayacensis are very rare and mislabeled anyways. Karel Knize is selling seed of this type under the name KK2148 Trichocereus tarmaensis .

Echinopsis tarmaensis Tarma Trichocereus tarmaensis  2

Backeberg´s photo Echinopsis tarmaensis Tarma Trichocereus tarmaensis

This picture shows a seedgrown specimen that was sold through the SAB shop in Australia.

SAB Trichocereus Tarmaensis KK2148 Echinopsis tarmaensis knize

When looking at this pic, it gets obvious that this type is VERY similar to some types of Trichocereus cuzcoensis, and even has similarities to a KK242. I do not think that specimens of KK2148  could be recognized as such without knowing the label. They are simply synonymous with some types of Trichocereus cuzcoensis. This species grows at around 3000 meters altitude.

Trichocereus tarmaensis Echinopsis tarmaensis Tarma  Photo: S. Preiss

Echinopsis tarmaensis Tarma Trichocereus tarmaensis  Trichocereus.net

Echinopsis tarmaensis Tarma Trichocereus tarmaensis  Trichocereus.net 2

Echinopsis tarmaensis Tarma Trichocereus tarmaensis  Trichocereus.net 3

Below: Some photos from Tarma. The first one does not show a Trichocereus, but the others show some of the wild forms in between Trichocereus tarmaensis and Trichocereus knuthianus.

Columnar Cactus Cacti Tarma

Trichocereus tarmaensis Echinopsis tarmaensis Tarma Knuthianus

Trichocereus tarmaensis Echinopsis tarmaensis Tarma Knuthianus 2

Trichocereus tarmaensis Echinopsis tarmaensis Tarma Knuthianus 5

 

 

 

 

Trichocereus knuthianus (Echinopsis knuthiana)

Trichocereus knuthianus (Echinopsis knuthiana)

Trichocereus knuthianus is a plant that can be found in many parts of Peru. As a species, it is much more diverse than the clone that it is mostly reduced to and there are various forms that belong into the context of Trichocereus knuthianus.  In addition, there are intermediates with Trichocereus schoenii, Trichocereus tarmaensis and Trichocereus cuzcoensis.

Alternative name: Echinopsis knuthiana

Synonyms: Trichocereus knuthiana, Trichocereus knuthianus, Trichocereus cuzcoensis var. knuthianus, Cereus knuthianus, Azureocereus deflexispinus, Cereus deflexispinus, Trichocereus tarmaensis, Trichocereus peruvianus var. Tarma, Trichocereus crassiarboreus, Trichocereus schoenii, Echinopsis schoenii, Echinopsi tarmaensis (not all, but some of them clearly belong into the knuthianus context as well)

Though Trichocereus knuthianus is still considered a correct species with the name Echinopsis knuthiana, it is closely related to Trichocereus cuzcoensis and Trichocereus peruvianus. There was never any good DNA testing done to verify or question this, which is why it is on our short list of species that we´ll test for our upcoming book on the genus Trichocereus. In my opinion, it is a relative of Trichocereus cuzcoensis. We will find out how related exactly once we´ve ran some tests.

Trichocereus knuthianus was discovered and described by Curt Backeberg on the upper course of the Rio Marañon. The plant was named after Graf F.M.Knuth, who was Curt Backeberg´s co-author in the book KAKTUS ABC and a financier for some of his trips.

Rio Maranon Peru Trichocereus knuthianus Echinopsis knuthiana

Most plants that are available on the open market were originally sourced from Friedrich Ritters Seed list. Ritter´s collection number of Trichocereus knuthianus was FR567, sometimes also labeled as Trichocereus knuthianus f. pachanoi or Trichocereus knuthianus FR 677! This strain can be found in collections throughout the World though it is most common in Australia.

Ritter wrote that it´s probably synonymous with Trichocereus tarmaensis and I agree to a certain degree. In addition, he shared the opinion that Trichocereus knuthianus is actually a variety of Trichocereus cuzcoensis, which is most likely correct as well. Trichocereus cuzcoensis only grows in Cusco, but its close relatives grow all over Peru, e.g. Trichocereus tarmaensis, Trichocereus schoenii, etc.

Curt Backeberg, on the other hand did absolutely not agree with Ritter´s attempt to nullify Backeberg´s species, as it would mean that his newly described “species” would´ve become invalid. Generally speaking, Friedrich Ritter knew that plant very well .

Mature plants of Echinopsis knuthiana in habitat tend to have that tree-like rounded log-shape that you can observe on Trichocereus cuzcoensis too. Most other Trichocereus species do not form such  a rounded and tree-like stump, which is another indicator for its genetic proximity to the Cuzcoensis complex.

Trichocereus knuthianus is very widespread and grows in Central Peru and some Departments that surround it.

Title photo: Sams Plants

 

Trichocereus knuthianus Echinopsis knuthiana Fields

Above: Fields Knuthianus aka Fields Knuth

Trichocereus knuthianus Echinopsis knuthiana hybrid

Trichocereus knuthianus Echinopsis knuthiana 44

This Picture shows FR 677. Unfortunately not a very good pic:

Trichocereus knuthianus Echinopsis knuthiana FR 677 Ritter

 

 

Trichocereus knuthianus Echinopsis knuthiana FR 677 Ritter 2

Trichocereus knuthianus Echinopsis knuthiana 65

Trichocereus knuthianus Echinopsis knuthiana 677

Trichocereus knuthianus Echinopsis knuthiana 68

Trichocereus knuthianus Echinopsis knuthiana 69

Trichocereus knuthianus Echinopsis knuthiana 70

Trichocereus knuthianus Echinopsis knuthiana 71

Trichocereus knuthianus Echinopsis knuthiana 72

Trichocereus knuthianus Echinopsis knuthiana 73

Rodni Kisar

Fruit Trichocereus knuthianus Echinopsis knuthiana 77

Photos below: Delia and Rodni Kisar

Photo Echinopsis knuthiana Trichocereus knuthianusPhoto Echinopsis knuthiana Trichocereus knuthianus 2Photo Echinopsis knuthiana Trichocereus knuthianus 3

Trichocereus skottsbergii / Echinopsis skottsbergii (T. chiloensis)

Trichocereus skottsbergii / Echinopsis skottsbergii (T. chiloensis)

Trichocereus skottsbergii Backeberg, also called Echinopsis skottsbergii, is a columnar cactus that is closely related to Trichocereus chiloensis / Echinopsis chiloensis. Under current taxonomy it is placed as a subspecies below Trichocereus chiloensis with Echinopsis skottsbergii as currently accepted name.

The species was described by Curt Backeberg and named after Mr. Carl Johan Fredrik Skottsberg. Friedrich Ritter noted that it grows together with Trichocereus chiloensis without forming zones of hybridization. The easiest way to differentiate Tr. skottsbergii from Trichocereus chiloensis is by comparing the number of ribs. Echinopsis skottsbergii has 16-21 ribs, while Trichocereus chiloensis only has 16-18 ribs.

Curt Backeberg gives the form T. skottsbergii v. breviatus as a valid variety, but it was probably just a regional form of the same species. In the past, there were many unnecessary descriptions made that would not stand today. In my personal opinion, all the Chilean Trichocereus species are so closely related that it might not be a bad idea to consider them as one, very big and variable species. The same treatment works well with the whole group of species around T. peruvianus.

In Chile, the variability of the genus Trichocereus is just as big as the variability of Trichocereus species in Peru or Bolivia. E. skottsbergii is extremely close to Trichocereus litoralis, also known as Trichocereus chiloensis ssp. litoralis as well. It is very difficult to distinguish them and descriptions are absolutely necessary.

Trichocereus skottsbergii Trichocereus chiloensis Pedro Lopez Artes JN 380 Highway Fray Jorge, Coquimbo, Chile 269m 

Trichocereus skottsbergii Trichocereus chiloensis Pedro Lopez Artes JN 380 Highway Fray Jorge, Coquimbo, Chile 269m (2)

Trichocereus skottsbergii Trichocereus chiloensis Pedro Lopez Artes JN 380 Highway Fray Jorge, Coquimbo, Chile 269m

Trichocereus chiloensis ssp. skottsbergii Friedrich Ritter

Original photo by Friedrich Ritter

Pato novoa Trichocereus skottsbergii Echinopsis_skottsbergii_—_Pato_Novoa_001

Trichocereus skottsbergii Pato novoa Echinopsis_skottsbergii_—_Pato_Novoa_001

 

Trichocereus skottsbergii Echinopsis chiloensis skottsbergii Ulrich Hörner (4)

Ulrich Hörner (4)

Trichocereus skottsbergii Echinopsis chiloensis skottsbergii Ulrich Hörner

Trichocereus skottsbergii Echinopsis chiloensis skottsbergii Ulrich Hörner (2)

Ulrich Hörner (2)

A hybrid between Trichocereus deserticolus x T. skottsbergii (Pedro Lopez Artes)

A hybrid between Trichocereus deserticolus x Trichocereus skottsbergii Pedro Lopez Artes

Ulrich Hörner (below)

Trichocereus skottsbergii Echinopsis chiloensis ssp. skottsbergii Ulrich Hörner (4)Trichocereus skottsbergii Echinopsis chiloensis ssp. skottsbergii Ulrich Hörner (5)Trichocereus skottsbergii Echinopsis chiloensis ssp. skottsbergii Ulrich Hörner (223)Trichocereus skottsbergii Echinopsis chiloensis ssp. skottsbergii Ulrich Hörner (2)Trichocereus skottsbergii Trichocereus chiloensis Ulrich Hörner 2Trichocereus skottsbergii Trichocereus chiloensis Ulrich Hörner

Pedro Lopez Artes (Below)

  Trichocereus skottsbergii Trichocereus chiloensis Pedro Lopez ArtesTrichocereus skottsbergii Trichocereus chiloensis Pedro Lopez Artes (2)Trichocereus skottsbergii Trichocereus chiloensis Pedro Lopez Artes (3)Trichocereus skottsbergii Trichocereus chiloensis Pedro Lopez Artes (4)Trichocereus skottsbergii Trichocereus chiloensis Pedro Lopez Artes (5)Trichocereus skottsbergii Trichocereus chiloensis Pedro Lopez Artes (6)Trichocereus skottsbergii Trichocereus chiloensis Pedro Lopez Artes (7)Trichocereus skottsbergii Trichocereus chiloensis Pedro Lopez Artes (8)Trichocereus skottsbergii Trichocereus chiloensis Pedro Lopez Artes (9)Trichocereus skottsbergii Pedro Lopez Artes (2) Echinopsis chiloensis skottsbergii

Ulrich Hörner (below)

Trichocereus skottsbergii Echinopsis chiloensis skottsbergii Ulrich Hörner (3)

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Trichocereus smrzianus / Echinopsis smrziana

Trichocereus smrzianus / Echinopsis smrziana

Backeberg described Trichocereus smrzianus / Echinopsis smrziana in his KAKTUS ABC, a book that did not get a very wide release. Besides the description is highly controversial because it basically re-describes various forms of Echinopsis schickendantzii / Trichocereus schickendantzii and Trichocereus walteri that are barely on the level of a regional form.

Synonyms: Trichocereus smrzianus, Soehrensia smrziana, Soehrensia smrzianus, Echinopsis smrzianus, Echinopsis smrziana, Trichocereus schickendantzii, Echinopsis schickendantzii, Trichocereus walteri, Echinopsis walteri, etc.

Origin of Trichocereus smrzianus:

Argentina, Salta

Description of Echinopsis smrziana:

This species grows alone or in groups of larger clusters. It has a large, round body and reaches a maximum diameter of 2 meters and can get up to 60-70 centimeters tall. The plant is extremely variable and can grow like a clustering cactus like Trichocereus schickendantzii or in a columnar way, very similar to Trichocereus spachianus. It has 10-15 ribs and only grows at one location, which was also described as the type locality. T.smrzianus is extremely rare, though it is sometimes available on the commercial and sometimes shows up in cactus collections. The fact that the plant has so many ribs, makes it distinguishable from plants like Trichocereus candicans or Trichocereus spachianus. Young plants can look almost identical though, which is why identification of this species should not be done on juvenile plants. The bigger the plants, the broader the ribs are, what gives it a very typical Soehrensia look and it looks much closer to Soehrensia than to Trichocereus.

Spines of T.smrzianus:

The very thin spines are usually yellow to white. Plants have 8-15 spines on one areole, but Trichocereus smrzianus is extremely variable, what makes it so hard to ID. If you encounter the plants in the field it should be fairly easy to identify because it only grows on one location in Chachipampa, Argentina. It has 1-4 middle spines that are up to 3 centimeters long.

Flowers of E.smrziana:

Trichocereus smrzianus has white flowers, almost identical to the ones on T. schickendantzii. Overall it is a form of the latter, which means it is very hard to distinguish it from it. The plant flowers from the upper part of the body, what you can see on the featured image very well. The flowers get between 10-20 centimeters long and look very similar to the ones on Trichocereus tarijensis.

Fruit:

Trichocereus smrzianus has a round, green fruit that is between 2-5 centimeters in diameter and tastes very nicely. The name is a really bad example of how a name should not be. Not sure how it sounds in your language but in mine it sounds like having a seizure while biting your tongue off.
The taxonomic status of this group of plants was very inconsistent and due to the fact that there is a relationship to the genus Soehrensia, taxonomists have moved them back and forth from Trichocereus to, Soehrensia and Echinopsis now. After the merger with Echinopsis, taxonomy went full circle and re-declared Soehrensia as an accepted genus and it seems like it might stay like that. However, the plant is definitely close to Trichocereus schickendantzii and it´s definitely possible that Trichocereus smrzianus is just a natural hybrid between Trichocereus schickendantzii and a different species like Trichocereus tarijensis, or a regional form of the Trichocereus schickendantzii group.

Trichocereus smrzianus, Echinopsis smrziana Emőke Dénes Schickendantzii Kew_Gardens_1Emőke Dénes Echinopsis_smrziana_-_Kew_Gardens

Trichocereus smrzianus, Echinopsis smrziana Schickendantzii Oslo Sukkulentforening Soehrensia_smrzianaOslo Sukkulentforening Soehrensia_smrziana

by Michael Wolf Trichocereus smrzianus Echinopsis smrziana Schickendantzii

by Michael Wolf Echinopsis smrziana

by Michael Wolf Trichocereus smrzianus Echinopsis smrziana Schickendantzii

Photos below: Trichocereus smrzianus by Leanne Kelly

Trichocereus smrzianus Echinopsis smrziana Leanne Kelly (4)

Leanne Kelly

Trichocereus smrzianus Echinopsis smrziana Leanne Kelly (4)

Leanne Kelly (4)

Trichocereus smrzianus Echinopsis smrziana Leanne Kelly (3)

Leanne Kelly (3)

Trichocereus smrzianus Echinopsis smrziana Leanne Kelly (3)

Leanne Kelly

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Trichocereus riomizquensis RITTER (Echinopsis)

Trichocereus riomizquensis RITTER (Echinopsis)

Trichocereus riomizquensis is a Bolivian Trichocereus species that is closely related to Trichocereus bridgesii. I count it as a close relative and potential regional form of Trichocereus bridgesii, which is only endemic to one site in Bolivia near the Rio Mizque.
The species was discovered and described by the German cactus field botanist Friedrich Ritter, who gave Chuyllas as the type locality and described it growing on steep slopes in the province Campero.

His Field Number was FR 856. Friedrich Ritter was one of the leading Cactus experts of his time and successfully ran a seed shop, in which he sold this species as seed to people all over the world. Trichocereus riomizquensis was also visited during the Sacred Succulents Fieldtrips and they found a couple of different types growing around that area.

In Ritter´s book, he published a photo of this species. Unfortunately this photo is not very good and it is one of the species that are rare in cultivation. Almost all labels on plants grown from Ritter´s seeds are lost, but the plant is definitely available. On the market, it sometimes shows up labeled as Trichocereus bridgesii, or probably also labeled as Trichocereus PC. Please note that there is a wide variety of plants from this site and the range is very big, ranging from spiny to completely spineless plants.

Ben Kamm published some photos of a Herbarium specimen that was very close to Trichocereus bridgesii as well.

Where to buy seeds and plants of Trichocereus riomizquensis?:

Though Trichocereus riomizquensis is common in cactus collection in the USA, it is usually mislabeled. Sacred Succulents were giving away seeds after their Field Trips and some plants might have gotten into the hands of collectors. They are also selling live plants grown from their collected seeds sometimes.

Description of Trichocereus riomizquensis:

This is partial description of Friedrich Ritter´s original description, including remarks on how to keep it apart from T. scopulicola.

Trichocereus riomizquensis is 6-8 centimeters thick (while Trichocereus scopulicola is 8-10 centimeters thick), it has 5-6 ribs, (T. scopulicola: 4-6), its flanks are 2 centimeters wide (Scopulicola 3-4 cm wide flanks), the flanks are less rounded than the ones on Tr. scopulicola. It has rounded areoles (while the ones on T. scopulicola are usually oval). The areoles have a very visible fluff with a diameter of 2-3 mm. The 1-5 spines are honey-colored and between 1-3 mm long. Sometimes they are even missing.
The flower of Trichocereus riomizquensis is 20 centimeters long (while the flowers of T. scopulicola are 16-20) and covered with dark brown/white wool with large scales. The fruit looks knobby.

Type locality: Chuyllas near the Rio Mizque, on very steep rock walls in the province Campero, Bolivia. Discovered from Ritter in 1958 – FR 856.

Trichocereus riomizquensis Ritter

Ritter´s original photo of his Trichocereus riomizquensis. It is possible that this plant is the same strain as the American PC clone, which gets very close to this plant´s phenotype.

Trichocereus PC clone Predominant cultivar

In comparison to Ritter´s plant, check out the PC Trichocereus clone above. (Forest and Kim Starr)

Trichocereus riomizquensis Herbarium, Cochabamba, Bolivia 2010 copyright B

Trichocereus riomizquensis Herbarium, Cochabamba, Bolivia 2010 232

This is one of the plants from the Sacred Succulents Field Trips:

Trichocereus Riomizquensis BK10508Copyright Ben Kamm, Sacredsucculents.com

 

Trichocereus Riomizquensis BK 10.08.7

Trichocereus Riomizquensis BK 10.08.7

BK10512.1 Trichocereus riomizquensis, Totora, Cochabamba, Bolivia

Trichocereus riomizquensis is one of the most interesting species from the Sacred Succulents Field Trips because of its incredible range. Some plants look like the Trichocereus bridgesii-type plants with long spines from the Field Trips and some other ones look like the short spine versions that Friedrich Ritter´s description was about.

If you take a close look at the whole appearance of this plant, you can see that it has a similar areole shape to the areoles on the well known Trichocereus PC clone, also known as predominant cultivar or predominate cultivar.  The flower and the overall appearance are so similar that everything else would be extremely surprising. Despite the fact that there are some very spiny plants at this site, there are some other which get extremely close to Ritter´s original photo. Though this will probably never be proven, there´s definitely reasonable doubt that this PC clone is actually a Trichocereus pachanoi.

There is a lot variation within the populations the original site near the Rio Mizque. This population is one of the most interesting Trichocereus populations out there and DNA testing should absolutely be made to look into its relationship to Trichocereus bridgesii.

Where to buy seeds or cuttings of Trichocereus riomizquensis:

Well, Ben and Sacred Succulents would be my starting point if I were in the USA. They don´t ship plants internationally, but if you have the luck to be in the country you might be able to get some cuttings. Apart from this, I do not know any sources for this species. Most of Ritter´s old plants have lost their labels meanwhile, which makes getting one even harden. I am sure that some of them show up on online market places labeled as Trichocereus bridgesii every now and then.

BK10512.1 Trichocereus riomizquensis, Totora, Cochabamba, Bolivia 1
Copyright: Ben Kamm, Sacredsucculents.com

BK10512.1 Trichocereus riomizquensis, Totora, Cochabamba, Bolivia 2

BK10512.1 Trichocereus riomizquensis, Totora, Cochabamba, Bolivia 3

BK10512.1 Trichocereus riomizquensis, Totora, Cochabamba, Bolivia Echinopsis BK10512.1 Trichocereus riomizquensis, Totora, Cochabamba, Bolivia Echinopsis 5  BK10512.1 Trichocereus riomizquensis, Totora, Cochabamba, Bolivia Echinopsis 6

BK10512.4 Trichocereus riomizquensis, Totora,  Cochabamba, Bolivia 2010

BK10512.4 Trichocereus riomizquensis, Totora,  Cochabamba, Bolivia Echinopsis Rio Mizque

This photo here looks really unspectacular, but shows the area of the Rio Mizque. It is the place of origin of this rare species and most of the plants that can be found there are obviously Bridgesii related.

BK10512.4 Trichocereus riomizquensis, Totora,  Cochabamba, Bolivia Echinopsis Rio Mizque 2

BK10512.4 Trichocereus riomizquensis, Totora,  Cochabamba, Bolivia Echinopsis Rio Mizque 4

Trichocereus santaensis / Echinopsis santaensis descriptions

Trichocereus santaensis / Echinopsis santaensis descriptions

Trichocereus santaensis is columnar cactus and species described by Curt Backeberg and Werner Rauh. It is endemic to the Santa Valley in Peru. There are many different forms that belong into the larger context of T. santaensis, e.g. Trichocereus sp. Chavin de Huantar also known as El Lanzon, Trichocereus huanucoensis, Trichocereus pallarensis and many others.

Trichocereus santaensis Chavin de Huantar Echinopsis Chavin Herbalists

Echinopsis santaensis Trichocereus santaensis Rio Santa Peru Valley

Origin of Trichocereus santaensis

Northern Peru, the valley around the Rio Santa, Puente, Bedoya, Huayanca

Can be kept apart from Trichocereus cuzcoensis by the absence of swollen spine bases. It also has a more frosted blue skin color, has fewer spines and shorter middle spines. Unlike Trichocereus peruvianus, it grows always columnar and does not grow prostrate.

trichocereus santaensis Huntington Botanical Garden Echinopsis santaensis HBGTrichocereus Santaensis – Huntington Botanical Garden – by Richard Hipp!

Description of Trichocereus santaensis Rauh & backb g -. Descr. Cact. Nov. 20, 1956

Trichocereus santaensis can get up to five meters high and branches from the bottom. The stems are blue-green to a glaucous green. It has 7-9 ribs that are similarly broad than the ones on Trichocereus knuthianus aka Echinopsis knuthiana. There is a distinct furrow above the areoles. This distinct V-Notch is very strong in young pups. The areoles have a diameter of approximately 1 centimeter and Trichocereus santaensis has between 1-3 radial spines. Spines medium long to short. In addition, Trichocereus santaensis has one very long middle spine, which is up to 5 centimeters long.

Flower: The flower is white and gets up to 22 centimeters in length. It has a similar flower than other San Pedro types, which is another indicator that Trichocereus santaensis is just a regional form of another species, e.g. T. pachanoi or T. peruvianus.

Origin/Habitat: Rio Santa, Puente, Huayacana, Bedoya.

Trichocereus santaensis is very similar to Trichocereus cuzcoensis and is constantly confused with it. However, it does NOT have rounded, knobby spine basesBesides, the spination is less strong and grows always columnar instead of creeping. Today, the species would probably not be considered to be correct and extensive DNA testing is necessary to look into the limits of this species and where other species begin.

Please note that T. santaensis is very variable due to the high number of regional forms. Some of which have red spines, some with yellow spines and some where the spines are completely absent.

trichocereus santaensis Echinopsis santaensis Rio Santa

 

In the Chapter of Trichocereus peruvianus, Backeberg wrote about its growth type:

I even found the Type initially growing erect, then lying or hanging . But near Matucana (Sic!), there also are upright growing varities of Trichocereus santaensis, which probably weren´t recognized as a seperate species.
The identification of these species with Tr. macrogonus (KKDE., 20, 1941) i cannot agree with. 
However, I definitely think that some of the more spiny forms of T. santaensis could´ve been the lost T. macrogonus. Some of them are extremely spiny.
 trichocereus santaensis Echinopsis backeberg Echinopsis cactus
This is Backebergs Key for Trichocereus santaensis
Branches to 10 cm
Blue green shoots
Ribs 7, very broad, strongly furrowed,
Not flattened furrows
Spines gray-brown, brighter towards the base
Middle spines:
1 spine is longer, spines up to 4 cm long

Friedrich Ritter´s description of Trichocereus santaensis

Trichocereus SANTAENSIS RAUH & BACKBG. 1956 RAUH: BEITRÄGE PERUANISCHER KAKTEENVEGETATION
1958, s. 361
Differences from TR. Pachanoi (data for the latter in parentheses):
Body gray-green (grass green to bluish green). Ri. 6-7, usually 6 (5-8, in
Peru medium to 10 and even higher), on the Areoles a slight v-shaped
Notch (little cross notch). Ar. 3-5 mm Dm
Spines: few or absent,Rsp. to 3, a few mm to 3 cm long,
Middle Spines. usually one, often it is the only Spine, a few mm to 4 cm long.
Flower. Near the apex, about 18-19 cm long, about 12 cm wide open (up to 20 cm wide between the
outer petals), obliquely upward (about protruding horizontally), just
(with two slight curves). Nectar Chamber 19 mm long (slightly longer), without
significant gap (small space), with little or no
Nectar (with some nectar). Tube about ca 6 cm long with 2.5 cm further
Opening (longer and wider). Petals slightly shorter and narrower, the outer
almost adjacent to the interior Ones (strongly bent outwards),
SANTA Valley at 2000 m and about Depart. Ancash; only here. No. FR 567a.
Fig. 1,188,


Trichocereus santaensis Friedrich Ritter Echinopsis santaensis

Trichocereus santaensis / Echinopsis santaensis at the Rio Santa (Riley Flatten)

Trichocereus santaensis Echinopsis santaensis Rio Santa Riley FlattenTrichocereus santaensis Rio Santa Santa Valley Echinopsis santaensis Riley Flatten

Echinopsis santaensis Trichocereus santaensis Rio Santa Riley Flatten

Photos below Trichocereus santaensis / Echinopsis santaensis in Chavin de Huantar, El Lanzon (Riley Flatten)

Photo Trichocereus Chavin de Huantar El Lanzon Trichocereus santaensis Echinopsis Riley FlattenPhoto Trichocereus Chavin de Huantar El Lanzon Trichocereus santaensis Echinopsis Riley Flatten 2Photo Trichocereus Chavin de Huantar El Lanzon Trichocereus santaensis Echinopsis Riley Flatten 3Photo Trichocereus Chavin de Huantar El Lanzon Trichocereus santaensis Echinopsis Riley Flatten 4Photo Trichocereus Chavin de Huantar El Lanzon Trichocereus santaensis Echinopsis santaensis Riley FlattenPhoto Trichocereus Chavin de Huantar El Lanzon Trichocereus santaensis Echinopsis santaensis Riley Flatten 2Photos Trichocereus santaensis Chavin de Huantar El Lanzon Trichocereus santaensis Echinopsis santaensis Riley FlattenPhotos Trichocereus santaensis Chavin de Huantar El Lanzon Trichocereus santaensis Echinopsis santaensis Riley Flatten 22Photos Trichocereus santaensis Chavin de Huantar El Lanzon Trichocereus santaensis Echinopsis santaensis Riley Flatten 3Photos Trichocereus santaensis Chavin de Huantar El Lanzon Trichocereus santaensis Echinopsis santaensis Riley Flatten 4El Lanzon Photo Trichocereus santaensis Chavin de Huantar El Lanzon Trichocereus santaensis Echinopsis santaensis Riley FlattenCactus photo Trichocereus santaensis Chavin de Huantar El Lanzon Trichocereus santaensis Echinopsis santaensis Riley FlattenCactus photo Trichocereus santaensis Chavin de Huantar El Lanzon Trichocereus santaensis Echinopsis santaensis Riley FlattenCactus photo Trichocereus santaensis Chavin de Huantar El Lanzon Trichocereus santaensis Echinopsis santaensis Riley Flatten 3Cactus photo Trichocereus santaensis Chavin de Huantar El Lanzon Trichocereus santaensis Echinopsis santaensis Riley Flatten 2Cactus photo Trichocereus santaensis Chavin de Huantar El Lanzon Trichocereus santaensis Echinopsis santaensis Riley Flatten 5Trichocereus santaensis El Lanzon San Marcos Chavin de HuantarTrichocereus santaensis El Lanzon San Marcos Chavin de Huantar 2Trichocereus santaensis El Lanzon San Marcos Chavin de Huantar 3Trichocereus santaensis El Lanzon San Marcos Chavin de Huantar 4Trichocereus santaensis El Lanzon San Marcos Chavin de Huantar 5

 

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