Lophophora

Peyote is the common name for Lophophora williamsii, a small, spineless, blue-green button cactus and the best-known species in the genus Lophophora. The genus belongs to the cactus family (Cactaceae) and was erected by John Merle Coulter in 1894; its members carry woolly areole tufts in place of spines and a fleshy taproot that usually outweighs the visible stem. At rarecactus.com we grow every Lophophora from seed, the only legal and ethical route for a slow-growing, heavily collected genus.

Yes. Peyote is simply the common name for Lophophora williamsii, so the two names refer to the same species. The word peyote derives from the Nahuatl peyotl. Botanists use the binomial Lophophora williamsii, while peyote is the vernacular term most people search for. The related Lophophora diffusa is sometimes called false peyote because it carries little mescaline, so peyote in the strict sense means L. williamsii.

Peyote (Lophophora williamsii) is a small, spineless, blue-green to grey-green cactus, usually 2 to 7 cm across, with a flattened domed top divided into 4 to 13 low ribs. White or pale tufts of wool sit at the areoles in place of spines, and funnelform pink to white flowers open from the woolly crown. Below ground a thick taproot anchors the plant and lets it retract toward the soil surface in drought.

Lophophora williamsii, the peyote cactus, occupies a crescent-shaped range from the limestone scrub of Webb, Starr, and Zapata counties in south Texas, south through Coahuila, Nuevo León, Tamaulipas, San Luis Potosí, and Querétaro, at elevations of 100 to 1,900 m. It grows beneath nurse shrubs in gravelly, alkaline soils where rainfall averages 200 to 600 mm per year. Lophophora diffusa has a much smaller range confined to Querétaro and Hidalgo in central Mexico.

Kew’s Plants of the World Online currently accepts four species: L. williamsii (peyote), L. diffusa, L. fricii, and L. alberto-vojtechii. Many AI overviews and older references cite only two species, omitting the more recently accepted taxa. Numerous named varieties and forms, including crested (f. cristata) mutations, are recognized by growers but carry no formal taxonomic standing.

The clearest visual clue is stem colour and rib structure: peyote (L. williamsii) has blue-green to grey-green stems with 4 to 13 distinct ribs and furrows, while L. diffusa, sometimes called false peyote, shows yellowish-green stems with a flattened or warty surface and no defined ribs. They also differ chemically: L. williamsii carries mescaline as its dominant alkaloid, whereas L. diffusa’s primary alkaloid is pellotine. Geographic origin provides a third check, since any wild-type specimen from outside Querétaro and Hidalgo is almost certainly L. williamsii.

No. Peyote is a cactus (Lophophora williamsii), while mescaline is a single alkaloid the plant produces, so the plant and the molecule are not interchangeable terms. Mescaline is one of many compounds in the plant’s tissue. The distinction matters legally as well as botanically, because regulators control the molecule and that in turn governs the status of the living plant. Lophophora diffusa, by contrast, contains little to no mescaline.

Peyote (Lophophora williamsii) produces diurnal flowers from May through September, with peak flowering during the summer monsoon period. The flowers are funnelform, 1 to 2.4 cm long, typically pinkish-white with a deeper pink midstripe, and last two to three days each. Seed grown plants in cultivation can reach flowering size in as few as 3 to 5 years under optimal conditions, compared with 10 to 15 years for wild specimens.

All four Lophophora species face habitat pressure from agricultural conversion, livestock grazing, and illegal collection. The IUCN Red List classifies peyote (L. williamsii) as Vulnerable with a declining population trend; per-species assessments for L. diffusa, L. fricii, and L. alberto-vojtechii are summarised on each species page. The genus is listed under CITES Appendix II, requiring documentation for all international trade. In Mexico, NOM-059-SEMARNAT-2010 lists the native populations as protected, prohibiting wild collection without federal permits.

Legality varies by species and jurisdiction, and this is a factual summary, not legal advice. In the United States, peyote (L. williamsii) and its principal alkaloid mescaline are Schedule I controlled substances; federal law provides a bona-fide religious-use exemption for enrolled members of the Native American Church. The genus is listed under CITES Appendix II, requiring documentation for international trade, and Mexican law (NOM-059-SEMARNAT-2010) protects wild populations. Nursery-propagated seed of the non-restricted species is legally available across much of the European Union, the United Kingdom, Canada, and Australia. See the peyote (Lophophora williamsii) species page for country-specific detail.

Peyote and its relatives perform best in a sharply draining mix of 50 to 60% pumice or lava rock blended with decomposed granite or limestone chip to replicate the native limestone-scrub soils. Water thoroughly during the active growing season (spring through early autumn), allowing the substrate to dry completely between waterings, then keep plants nearly dry from late October through February. Full sun or very bright indirect light encourages compact growth and reliable flowering.