Tetradymia

Tetradymia is a genus of North American shrubs in the groundsel tribe within the sunflower family. Horsebrush is a common name for plants in this genus.

• Tetradymia argyraea - CA (Riverside + San Bernardino Cos), AZ (Mohave Co), NV (Clark Co)
 * Species

• Tetradymia axillaris - CA AZ NV UT

• Tetradymia canescens - BC WA ID MT WY OR CA NV UT CO AZ NM

• Tetradymia comosa - CA NV

• Tetradymia filifolia - NM

• Tetradymia glabrata - CA NV UT OR ID

• Tetradymia nuttallii - NV UT CO WY

• Tetradymia spinosa - CA OR NV ID UT MT WY CO NM

• Tetradymia stenolepis - CA NV AZ

• Tetradymia tetrameres - NV CA (Mono Co) see Lepidospartum Psathyrotes
 * formerly included
 * Tetradymia ramosissima - Psathyrotes ramosissima
 * Tetradymia squamata - Lepidospartum squamatum