Deinandra is a genus of flowering plants in the tribe Madieae within the family Asteraceae. The genus is not recognized as distinct by all authorities; its species are often treated as members of the genus Hemizonia.
Distribution
Deinandra plants are native to the Western United States (California and Arizona) and northwest Mexico (Baja California and Baja California Sur).
Description
Species in this genus are annual or perennial herbs, commonly known as "tarweeds" or "tarplants." They are characterized by their resinous, aromatic foliage and yellow, daisy-like flower heads. Many species are adapted to dry, open habitats such as coastal scrub, chaparral, grasslands, and vernal pools.
Species
The following species are accepted in the genus Deinandra:
- Deinandra arida – Red Rock tarweed (Kern County, California)
- Deinandra bacigalupii – Livermore tarweed (Alameda County, California)
- Deinandra clementina (California)
- Deinandra conjugens – Otay tarweed (San Diego County, California and Baja California)
- Deinandra corymbosa (California from Santa Barbara County to Humboldt County)
- Deinandra fasciculata – clustered tarweed (southern California and Baja California)
- Deinandra floribunda (California and Baja California)
- Deinandra frutescens (Guadalupe Island, Mexico)
- Deinandra greeneana (Baja California including Guadalupe Island)
- Deinandra halliana (central California)
- Deinandra increscens – grassland tarweed (central California)
- Deinandra kelloggii (California, Arizona, Baja California)
- Deinandra lobbii (central and northern California)
- Deinandra martirensis (Baja California, Baja California Sur)
- Deinandra minthornii – Santa Susana tarweed (Southern California; state and CNPS listed rare species)
- Deinandra mohavensis – Mojave tarweed (California)
- Deinandra pallida (California)
- Deinandra palmeri (Baja California)
- Deinandra paniculata (California and Baja California)
- Deinandra pentactis (central California)
- Deinandra streetsii (Baja California)
Taxonomy
The genus Deinandra was described by Edward Lee Greene in 1897 in Flora Franciscana. Some taxonomists, however, place these species within the genus Hemizonia, and the circumscription of the genus has been subject to revision. Modern phylogenetic work by Baldwin (1999) supported the recognition of Deinandra as a distinct genus within the subtribe Madiinae.
