Deinandra minthornii

Deinandra minthornii — (syn. Hemizonia minthornii) — is a rare California species of flowering plant in the family Asteraceae known by the common name Santa Susana tarplant, or Santa Susana tarweed. It is listed as a rare species by the California Department of Fish and Wildlife[3] and on the California Native Plant Society Inventory of Rare and Endangered Plants of California.[4]

Deinandra minthornii

Imperiled  (NatureServe)[1]
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Deinandra
Species:
D. minthornii
Binomial name
Deinandra minthornii
(Jeps.) B.G.Baldwin
Synonyms[2]

Hemizonia minthornii Jeps.

Distribution

Deinandra minthornii is endemic from the Santa Susana Mountains, through the Simi Hills, to the Santa Monica Mountains of the southwestern Transverse Ranges, in Los Angeles and Ventura Counties, Southern California.[1][5][6][7]

This plant grows in the coastal sage scrub and chaparral habitats of the coastal sage and chaparral, and the chaparral habitat of the adjacent inland the montane chaparral and woodlands. It can be found on rocky outcroppings and in sandstone crevices, from 300–500 metres (980–1,640 ft) in elevation.[1][6] There are about 20 occurrences of the plant, but several have not been observed recently.[5]

Description

Deinandra minthornii is a shrub or subshrub growing 15 centimetres (5.9 in) to 1 metre (3.3 ft) in height. The stems are hairy, glandular, and leafy. The thick leaves are linear, smooth-edged or with a few teeth. They are glandular and hairy to bristly.[8]

The phyllaries lining the flower heads are coated in glands. The head contains four to eight yellow ray florets and several yellow disc florets.[6][8]

References
  1. Hemizonia minthornii. The Nature Conservancy.
  2. The Plant List, Deinandra minthornii (Jeps.) B.G.Baldwin
  3. 14 California Code of Regulations § 670.2(c) - Plants of California Declared to be Endangered, Threatened or Rare, accessed 6.3.2022
  4. California Native Plant Society (CNPS). 2012. Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. . accessed 6.12.2012
  5. Hemizonia minthornii. Center for Plant Conservation.
  6. Hemizonia minthornii. Jepson. accessed 6.12.2012
  7. Calflora taxon report, University of California, Deinandra minthornii (Jeps.) B.G. Baldwin, Santa Susana tarplant
  8. Deinandra minthornii. Flora of North America.

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