About Euphorbia setiloba Engelm. ex Torr.
Euphorbia setiloba Engelm. ex Torr. is a species of euphorb, commonly known by the common name Yuma sandmat. It is native to the southwestern United States and northern Mexico, where it grows in dry habitat. It is a small, clumping annual herb with slender stems lined with pairs of tiny hairy leaves. Each leaf is only a few millimeters long, oval in shape, and has a bluntly pointed tip. Its minute inflorescence is a cyathium less than two millimeters wide. The cyathium has distinctive appendages that are white, with a small number of narrow, sharp-pointed lobes. A red nectar gland sits at the base of each appendage. The actual flowers sit at the center of the appendages: one female flower and several male flowers. The ovary of the female flower develops into a hairy, spherical fruit about one millimeter wide.
