1) Subshrub 2) Suffrutex 
It came into the news in 2005 when the Mount Diablo buckwheat (Eriogonum truncatum, believed to be extinct) was rediscovered. ==Importance for Lepidoptera== Eriogonum species are used as food plants by the larvae of some Lepidoptera (butterflies and moths). Several of these are monophagous, meaning their caterpillars only feed on this genus, somet...
[n] - any plant of the genus Eriogonum with small clustered flowers
noun any plant of the genus Eriogonum with small clustered flowers
any of various plants belonging to the genus Eriogonum, of the buckwheat family, native to southern and western North America. Cf. umbrella plant (def. 2).