Tetradymia

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Cladus: Campanulids
Ordo: Asterales

Familia: Asteraceae
Subfamilia: Asteroideae
Tribus: Senecioneae
Subtribus: Tussilagininae
Genus: Tetradymia
Species: T. argyraea – T. axillaris – T. canescens – T. comosa – T. filifolia – T. glabrata – T. nuttallii – T. spinosa – T. stenolepis – T. tetrameres

Nothospecies: T. × permixta
Source(s) of checklist:

eFloras 2008. Tetradymia in Flora of North America . Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.

Name

Tetradymia DC., Prodr. 6: 440. 1838.
Type species: Tetradymia canescens DC.

References

De Candolle, A.P. (1838) Prodr. 6: 440.
eFloras 2008. Tetradymia in Flora of North America . Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.

Vernacular names
English: horsebrush

Tetradymia is a genus of North American shrubs in the groundsel tribe within the sunflower family.[2][3][4][5] Horsebrush is a common name for plants in this genus.[6]

Species[1][7][8][9]

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

formerly included[1]

see Lepidospartum Psathyrotes

Tetradymia ramosissima - Psathyrotes ramosissima
Tetradymia squamata - Lepidospartum squamatum

References

Flann, C (ed) 2009+ Global Compositae Checklist Archived 2014-11-06 at archive.today
Candolle, Augustin Pyramus de, 1838. Prodromus Systematis Naturalis Regni Vegetabilis 6: 440 in Latin
Tropicos, Tetradymia DC.
Flora of North America. "Senecioneae". Family List. 20: 540. Retrieved 2009-08-07.
Botanic Garden and Botanical Museum Berlin-Dahlem. "Details for: Senecioneae". Euro+Med PlantBase. Freie Universität Berlin. Retrieved 2009-08-07.
USDA, NRCS (n.d.). "Tetradymia". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 8 December 2015.
The Plant List search for Tetradymia
Biota of North America Program 2013 county distribution maps
Strother, J. L. 1974. Taxonomy of Tetradymia (Compositae: Senecioneae). Brittonia 26: 177–202.