Trichocereus santaensis / Echinopsis santaensis descriptions

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Trichocereus santaensis / Echinopsis santaensis descriptions

Trichocereus santaensis is species described by Backeberg and Rauh from the Santa Valley in Peru. There are many plants that belong to T. santaensis, eg Trichocereus sp. Chavin de Huantar, Trichocereus huanucoensis, and many others.

Origin: 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 santaensisTrichocereus Santaensis – Huntington Botanical Garden – by Richard Hipp!

Description: 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 stemps 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, eg 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.

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

 

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 backeberg reduced
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
  1.  Friedrich Ritters Description was:
    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

 

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