Peyote Cactus - Lophophora williamsii 4cm with 3buds.

The various species of the genus Lophophora grow low to the ground and they often form groups with numerous, crowded shoots. The blue-green, yellow-green or sometimes reddish green shoots are mostly flattened spheres with sunken shoot tips. They can reach heights of from 2 to 7 centimeters (0.79 to 2.76 in) and diameters of 4 to 12 centimeters (1.6 to 4.7 in). There are often significant, vertical ribs consisting of low and rounded or hump-like bumps. From the cusp areoles arises a tuft of soft, yellowish or whitish woolly hairs. Spines are absent. Flowers are pink or white to slightly yellowish, sometimes reddish. They open during the day, are from 1 to 2.4 centimeters long, and reach a diameter from 1 to 2.2 centimeters.

 

Lophophora williamsii seedling at roughly 1 1/2 months of age

The cactus produces flowers sporadically; these are followed by small edible pink fruit. The club-shaped to elongated, fleshy fruits are bare and more or less rosy colored. At maturity, they are brownish-white and dry. The fruits do not burst open on their own and they are between 1.5 and 2 centimeters long. They contain black, pear-shaped seeds that are 1 to 1.5 mm long and 1 mm wide. The seeds require hot and humid conditions to germinate. Peyote contains a large spectrum of phenethylamine alkaloids. The principal one is mescaline. The mescaline content of Lophophora williamsii is about 0.4% fresh^[8] (undried) and 3-6% dried.^[8] Peyote is extremely slow growing. Cultivated specimens grow considerably faster, sometimes taking less than three years to go from seedling to mature flowering adult. More rapid growth can be achieved by grafting peyote onto mature San Pedro root stock.^[9]

The top of the cactus that grows above ground, also referred to as the crown, consists of disc-shaped buttons that are cut above the roots and sometimes dried. When done properly, the top of the root will form a callus and the root will not rot.^[10] When poor harvesting techniques are used, however, the entire plant dies. Currently in South Texas, peyote grows naturally but has been over-harvested, to the point that the state has listed it as an endangered species.^{[citation needed]} The buttons are generally chewed, or boiled in water to produce a psychoactive tea. Peyote is extremely bitter and most people are nauseated before they feel the onset of the psychoactive effects.