Echinopsis Pachanoi
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Echinopsis Pachanoi

San Pedro cactus
Starr 070320-5799 Echinopsis pachanoi.jpg
Echinopsis pachanoi in Hawaii
Scientific classification edit
Kingdom: Plantae
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Cactaceae
Subfamily: Cactoideae
Genus: Echinopsis
E. pachanoi
Binomial name
Echinopsis pachanoi
(Britton and Rose) Friedrich and Rowley

Trichocereus pachanoi Britton & Rose

Echinopsis pachanoi (syn. Trichocereus pachanoi) -- known as San Pedro cactus -- is a fast-growing columnar cactus native to the Andes Mountains at 2,000-3,000 m (6,600-9,800 ft) in altitude.[1][2] It is found in Argentina, Bolivia, Chile, Ecuador and Peru,[3] and it is cultivated in other parts of the world. Uses for it include traditional medicine and traditional veterinary medicine, and it is widely grown as an ornamental cactus. It has been used for healing and religious divination in the Andes Mountains region for over 3,000 years.[4] It is sometimes confused with its close relative Echinopsis peruviana (Peruvian torch cactus).


Echinopsis pachanoi is known by many names throughout South America such as achuma, huachuma, wachuma, aguacolla, hahuacollay, or giganton.[]


Echinopsis pachanoi is native to Ecuador and Peru. Its stems are light to dark green, sometimes glaucous, with a diameter of 6-15 cm (2.4-5.9 in) and usually 6-8 ribs. The whitish areoles may produce up to seven yellow to brown spines, each up to 2 cm (0.8 in) long; the plant is sometimes spineless.[2] The areoles are spaced evenly along the ribs, approximately 2 cm (0.8 in) apart.[3]Echinopsis pachanoi is normally 3-6 m (10-20 ft) tall and has multiple branches, usually extending from the base.[2] The tallest recorded specimen was 12.2 metres (40 ft) tall.[3] White flowers are produced at the end of the stems; they open at night. The flowers are large, around 19-24 cm (7.5-9.4 in) long with a diameter of up to 20 cm (7.9 in). There are black hairs along the length of the tube leading to the flower. Oblong dark green fruits are produced after fertilization, about 3 cm (1.2 in) across and 5-6 cm (2.0-2.4 in) long.[2]

Traditional uses

Hordenine, an alkaloid found in Echinopsis pachanoi
Echinopsis pachanoi, San Pedro Cactus, the tall cactus in the mid-foreground, in its natural habitat in Peru

Echinopsis pachanoi has a long history of being used in Andean traditional medicine. Archeological studies have found evidence of use going back two thousand years, to Moche culture.[5] Although Roman Catholic church authorities[who?] after the Spanish conquest attempted to suppress its use,[] this failed, as shown by the Christian element in the common name "San Pedro cactus" - Saint Peter cactus. The name is attributed[by whom?] to the belief that just as St Peter holds the keys to heaven, the effects of the cactus allow users "to reach heaven while still on earth."[6]


San Pedro cactus sliced to be brewed

The San Pedro cactus contains a number of alkaloids, including the well-studied chemical mescaline (0.21-1.8%), and also 3,4-dimethoxyphenethylamine, 3-Methoxytyramine, 4-hydroxy-3-methoxyphenethylamine, 4-hydroxy-3,5-dimethoxyphenethylamine, anhalonidine, anhalinine, hordenine, and tyramine.[7]

Mescaline (3,4,5-trimethoxyphenethylamine) is a psychedelic drug and entheogen, which is also found in some other species of genus Echinopsis (i.e. Echinopsis lageniformis, Echinopsis peruviana, and Echinopsis scopulicola) and the species Lophophora williamsii (peyote).[8]

Anecdotal evidence suggests that the highest concentration of active substances is found in the layer of green photosynthetic tissue just beneath the skin.[3]

There are various mescaline extraction techniques, simple (simmering in water 5 to 7 hours) and complex (such as an acid-base extraction), the latter technique yielding a material with a significantly higher concentration of mescaline.


A newly planted Echinopsis pachanoi (San Pedro Cactus) cutting

The San Pedro cactus grows in USDA hardiness zones 8b to 10.[9]

The San Pedro cactus is very easy to grow in most areas and grows best in a temperate climate. Because it grows naturally in the Peruvian Andes Mountains at high altitude and with high rainfall, it can withstand temperatures far below that of many other cacti. It requires fertile, free-draining soil. They average half a meter per year of new growth.[3][unreliable source?] They are susceptible to fungal diseases if over-watered, but are not nearly as sensitive as many other cacti, especially in warm weather. They can be sunburned and display a yellowing chlorotic reaction to overexposure to sunlight.

In winter, plants will etiolate, or become thin, due to lower levels of light. This may be problematic if the etiolated zone is not sufficiently strong to support future growth as the cactus may break in strong winds.

Propagation from cuttings

Like many other plants, Echinopsis pachanoi can be propagated from cuttings. The result is a genetic clone of the parent plant.[10] A long cactus column can be also laid on its side on the ground (like a log), and eventually roots will sprout from it and grow into the ground. After time, sprouts will form and cactus columns will grow upward out of it along its length.[10]

From seed

Like a lot of its relatives Trichocereus pachanoi as a species is easily grown from seed, often by means of a so-called "Takeaway Tek"[11][12][13]. This term refers to the practice of the sowing of Trichocereus (and sometimes other types of cactus) seed into plastic containers such as those many food takeaways are delivered in. This creates a semi-controlled humidity environment chamber for 6 months to a year, in which the seed may germinate and then grow relatively unbothered by environmental contamination.


In most countries it is legal to cultivate the San Pedro cactus. In countries where possession of mescaline and related compounds is illegal and highly penalized, cultivation for the purposes of consumption is most likely illegal and also highly penalized. This is the case in the United States, Australia, Canada, Sweden, Germany, and New Zealand, where it is currently legal to cultivate the San Pedro cactus for gardening and ornamental purposes, but not for consumption.[14][15]


See also


  1. ^ Rätsch, Christian (2002). Enzyklopädie der psychoaktiven Pflanzen. Botanik, Ethnopharmakologie und Anwendungen. Aarau: AT-Verlag. p. 15. ISBN 978-3-85502-570-1.
  2. ^ a b c d Anderson 2001, p. 276.
  3. ^ a b c d e Visionary Cactus Guide,, retrieved
  4. ^ Bigwood, Jeremy; Stafford, Peter J. (1992). Psychedelics encyclopedia. Berkeley, CA: Ronin Pub. pp. 118-9. ISBN 978-0-914171-51-5.
  5. ^ Bussmann RW, Sharon D (2006). "Traditional medicinal plant use in Northern Peru: tracking two thousand years of healing culture". J Ethnobiol Ethnomed. 2 (1): 47. doi:10.1186/1746-4269-2-47. PMC 1637095. PMID 17090303.
  6. ^ Anderson, Edward F. (2001). The Cactus Family. Pentland, Oregon: Timber Press. ISBN 978-0-88192-498-5. pp. 45-49.
  7. ^ Crosby, D.M.; McLaughlin, J.L. (Dec 1973). "Cactus Alkaloids. XIX Crystallization of Mescaline HCl and 3-Methoxytyramine HCl from Trichocereus panchanoi" (PDF). Lloydia and the Journal of Natural Products. 36 (4): 416-418. PMID 4773270. Retrieved 2013.
  8. ^ Anderson 2001, pp. 44-49.
  9. ^ "San Pedro Cactus (Echinopsis pachanoi)". Retrieved .
  10. ^ a b "What if the cut end doesn't dry properly and starts to mold" (PDF). Retrieved .
  11. ^ "Grow Cacti from Seed - Enhanced Takeaway Tek".
  12. ^ "How to Grow Trichocereus Cacti from Seed". 2018-07-15.
  13. ^ "Takeaway Tek (How to germinate cacti seeds)". 2015-07-07.
  14. ^ Northcott, Maddison (15 July 2019). "Sale of hallucinogenic Christchurch cactus sparks international interest". Stuff. Retrieved 2019.
  15. ^ Gilmer, Maureen (January 15, 2015). "San Pedro stays popular as an ornamental plant". Retrieved 2019.

External links

Media related to Echinopsis pachanoi at Wikimedia Commons

  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.



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