''Pholistoma'' is a small genus of flowering plants in the

borage family Boraginaceae, the borage or forget-me-not family, includes about 2,000 species of shrubs, trees and herbs in 146, to 156 genera with a worldwide distribution. The APG IV system from 2016 classifies the Boraginaceae as single family of the orde ...

known generally as fiestaflowers. There are three species, all native to a section of western North America between

Oregon Oregon () is a state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington, while the Snake River delineates much of its eastern boundary with Idaho. T ...

and

Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...

. They are fleshy annual herbs producing angled bristly or prickly stems with several brittle branches. The deeply lobed, bristly leaves are borne on winged petioles that clasp the stem at their bases. The plants bear rotate flowers in shades of blue, purple, or white depending on species. Species: *'' Pholistoma auritum'' - blue fiestaflower *'' Pholistoma membranaceum'' - white fiestaflower *'' Pholistoma racemosum'' - racemose fiestaflower

External links

Jepson Manual Treatment
Hydrophylloideae Boraginaceae genera {{Asterid-stub