Lophophora williamsii

Lophophora williamsii (Lem. ex J.F.Cels) J.M.Coult. (1894)

🌵 Author(s)	John Merle Coulter
🌵 Published in	Contr. U.S. Natl. Herb. 3(2): 131 (1894)
🌵 Basionym	Echinocactus williamsii (1842)
🌵 Basionym author(s)	Jean François Cels
🌵 Basionym published in	Ann. Fl. Pomone 10: 354 (1842)
🌵 Type of	Lophophora

Etymology

Latin Williamsĭi, genitive (possessive) form of Williamsĭus, latinization of Williams. Named for “Mr Williams, a keen enthusiast from the London area” (Cels), presumably British cactus collector the Rev. Theodore Williams of Hendon, whose gardener George Lawrence described the genus Echinofossulocactus.