Flat-top Buckwheat - Eriogonum plumatella - is a fall-blooming species in the desert where the sought-after butterfly Euphilotes pallescens elvirae uses it as a host.

Eriogonum plumatella, August 17, 2010 in the Mojave.

A patch of Eriogonum plumatella among Joshua Trees on the Mojave Desert edge near Juniper Hills, just about at the type locality of Euphilotes pallescens elvirae.