Trichocereus grandiflorus / Echinopsis grandiflora

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Trichocereus grandiflorus / Echinopsis grandiflora

Trichocereus grandiflorus is a cactus from the genus Trichocereus. Its status is highly questionable and the opinions are as varied as the names it carried.

Synonyms: Lobivia grandiflora, Lobivia grandiflorus, Helianthocereus grandiflora, Helianthocereus grandiflorus

Trichocereus grandiflorus was moved around a lot in the past. It is genetically close to the genera Lobivia and Soehrensia, which is why it was sometimes included there. Friedrich et al. listed it as Echinopsis grandiflora. Anderson then listed it as a synonym to Echinopsis calochlora in his CACTUS LEXICON. Joel Lodé lists it as Trichocereus rowleyi. Schlumpberger lists it as Soehrensia grandiflora (Schlumpberger).

Flower: The flowers of Trichocereus grandiflorus are usually white and between 15-25 Centimeters in size. The tube is usually very hairy, but there are countless hybrids with all kinds of flower colors available on the open market.

Origin: Argentina, especially around Catamarca. The original description refers to a plant from a private collection.

The original description as Lobivia grandiflora came from Britton & Rose. Because of that, the plant was labeled as a Lobivia in most classic cactus literature. In addition, the title „Grandiflorus“, which roughly means „Large Flower“ makes a lot of sense because most Lobivias usually have smaller flowers. The large flower size for a Lobivia shows that it is not a very normal Lobivia either. The collector Fric, who labeled it Chamaecereus giganteus, originally introduced the plant into the market, but since it was so different from Chamaecereus, this did not last long. Backeberg wanted to put it in his own Genus Helianthocereus due to the diurnal flowers, but that system was not adapted. Because of that the plant ended up in Trichocereus, where it was until the restructuring made by Friedrich et al.

Cultivation: Trichocereus grandiflorus is a very hardy plant that can grow a lot during just one growing season if watered accordingly. The plant is able to tolerate some frost but I would not recommend trying it out to the limit. I grow them at around 10° Celsius during the wintertime and keep them in a bright and well-ventilated room. I do not water them during the wintertime and only start watering again in April or May.

Buy Seed or Cutings of Trichocereus grandiflorus: This plant is available every now on then on marketplace sites like Ebay or Amazon. In addition, many growers use it to produce hybrids. The Californian nursery Sacred Succulents has some colored Grandiflora hybrids and they sell seed every now an then. You can also try to make a post at our Trichocereus group at http://facebook.com/groups/trichocereus   because there are some growers there who give some away every now and then. In addition, some commercial sellers breed with them. Köhres & Kakteen Haage sometimes has them in stock but I am not sure under what name they are selling them.

Trichocereus grandiflorus is very similar to Trichocereus schickendantzii and some even consider them close relatives. It´s sometimes difficult to keep the two apart and growers or collectors mix them up all the time. This mixing up is usually limited to small plants because as you can see in those photos included in this post, Trichocereus grandiflorus us MULTI-Ribbed and grows columnar. Trichocereus grandiflorus has a very typical pupping style at the base that I could not witness on Trichocereus schickendantzii. The pups almost look like little balls on the base of the plant while Trichocereus schickendanzii forms large clusters that can get up to 1-2 meters wide. The problem with Trichocereus grandiflorus is that the description bases on a collection plant.

Before we get to the pics, let me first take the time to say thank you to Prier, who donated those amazing pics. Thanks Prier!

 

Trichocereus grandiflorus / Echinopsis grandiflora

T.grandiflorus Patch_3

Trichocereus grandiflorus / Echinopsis grandiflora

T.grandiflorus weird flower_7

T.granidiflorus Pink_2

T.granidiflorus Red_5

T.granidiflorus Yellow_1

T.grandiflorus weird flower_5

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Trichocereus rowleyi hybrid – Photo credit: Jarek Tuszyński

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Trichocereus rowleyi hybrid – Photo credit: Jarek Tuszyński

echinopsis_rowleyi_hybrid_-_joshua_tree_california_-_6

Trichocereus rowleyi hybrid – Photo credit: Jarek Tuszyński

echinopsis_rowleyi_in_roscoff_garden

Trichocereus grandiflorus Photo Credit: Dinkum

 

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