View source for Echinopsis lageniformis

{{Taxobox | color = lightgreen
| name = ''Echinopsis lageniformis''
| image = IMG 8782-1.jpg
| image_width = 250px
| regnum = [[Plantae]]
| divisio = [[Flowering plant|Magnoliophyta]]
| classis = [[Dicotyledon|Magnoliopsida]]
| ordo = [[Caryophyllales]]
| familia = [[Cactaceae]]
| subfamilia = [[Cactoideae]]
| tribus = [[Trichocereeae]]
| genus = ''[[Echinopsis]]''
| species = '''''E. lageniformis'''
| binomial = ''Echinopsis lageniformis''
| binomial_authority =  (Förster) H.Friedrich & Glaetzle
| synonyms = ''Trichocereus bridgesii'' <small>Britton & Rose</small>
}}

'''''Echinopsis lageniformis''''' (Syn. ''Trichocereus bridgesii'') is a fast-growing columnar [[cactus]] from the high deserts of [[Bolivia]]. 
Among the indigenous populations of Bolivia, it is sometimes called ''achuma'' or ''wachuma'', although these names are also applied to related species such as ''[[Echinopsis pachanoi]]'' which are also used for their [[psychedelic_drug|psychedelic]] effects.

The plant is of light green colour and usually has 4 to 8 ribs. It can grow 2–5 m tall with stems of up to 15–20 cm in diameter. Spines are honey-coloured to brown and are located on the nodes in groups of up to 4. They can grow up to 6–7 cm in length and in fully grown plants are spaced evenly on the ribs, 2.5 to 3 cm apart.

[[Image:T_bridgesii_flower_05_JPG.jpg|thumb|left|200 pxl|''Echinopsis lageniformis'' flowers]]
As with related species, it seems to have long [[shamanism|shamanic]] tradition of use throughout its homeland. Chemical analysis of some variants of this species have shown it may include some of the most potent of the psychedelic ''Trichocereus'' species, although this is not conclusive nor does it apply to all strains of the species. Outside of its native habitat, it is one of the least known and used of the ''Trichocereus'' cacti for either its psychoactive or ornamental uses. This is not true in areas where it is the dominant species, for example, the [[La Paz]] area of [[Bolivia]].

[[Image:Baby_Bridgesii.jpg|thumb|200px|A baby Echinopsis Lageniformis [[cactus]] that has been growing for roughly one year.]]

There exist several mutant varieties of this species that are highly prized by ornamental cactus collectors. These include a [[Fasciation|cristate]] variety, two variants of [[monstrose]] growth, and a more recently developed clone that exhibits both monstrose and cristate growth. Of the monstrose varieties, one is often known by the name [[Penis Plant]]. These all tend to be much slower growing than the standard form of the species, but owing to their highly unusual shapes, they are sought after by cactus collectors.