Page:Memoir of a tour to northern Mexico.djvu/99

Rh Mexico—the first naturalist, it is believed; who explored the regions between Santa Fe, Chihuahua, and Saltillo) Wislizenia! From Oxystylis it is principally distinguished by its long stipitate ovary and capsule, which latter is reflexed, and by the elongated racemes; it may, however, have to be united with that genus.

On the mountains about El Paso, another of those cylindraceous Opuntiae was found, but much thinner and more slender than both species, mentioned previously. To judge from an imperfect description it most be nearly related to the Mexican O. virgata, Hort. Vind. I have given it