Eriogonum evanidum

About

Eriogonum evanidum is a rare species of wild buckwheat known by the common name vanishing wild buckwheat. It is native to southern California and Baja California, where it has been collected from widely scattered areas. Most historical occurrences are now extirpated. Some sources suggested that it was probably extinct, but living specimens were rediscovered in 2007.

Summary from Wikipedia