Deinandra arida

Critically 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. arida
Binomial name
Deinandra arida
(D.D.Keck) B.G.Baldwin
Synonyms[2]

Hemizonia arida D.D.Keck

Deiandra arida (formerly Hemizonia arida),[3] also called Red Rock tarplant, is a rare California annual plant in the family Asteraceae.[4]

Habitat and range

Deiandra arida occurs on clay and volcanic soils and in desert dry wash from 1,000-3,000 feet (300–900 m) in elevation.[4] It is known from only 10 sites in the Red Rock Canyon State Park area of the Mojave Desert in Kern County, California.[4][5][6]

Growth pattern

It is a branched annual growing from 1' to 3' (30–90 cm) tall.[4]

Leaves and stems

Lower leaves are inversely lanceolate and hairless, with toothed margins.[4] Upper leaves are without teeth (entire) at the outside edge, and are covered in sparse, short, stiff hairs, giving it a bristly feel.[4]

Flowers and fruits

Flower heads grow in flat-topped clusters at the tops of stems.[4] Flower heads have 18-25 yellow disk flowers, with 5-10 yellow ray flowers. Bristly phyllaries halfway enclose the akenes.[4]

References

  1. ↑ "NatureServe Explorer 2.0".
  2. ↑ Tropicos, Hemizonia arida D.D. Keck
  3. ↑ Mojave Desert Wildflowers, Pam MacKay, 2nd Ed. 2013, p. 314
  4. 1 2 3 4 5 6 7 8 Mojave Desert Wildflowers, Pam MacKay, 2nd Ed. 2013, p. 189
  5. ↑ Calflora taxon report, University of California, Deinandra arida (Keck) B.G. Baldwin Red Rock tarplant
  6. ↑ Flora of North America, Deinandra arida (D. D. Keck) B. G. Baldwin, Novon. 9: 467. 1999.
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