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FNA | Family List | FNA Vol. 21 | Asteraceae | Deinandra

4. Deinandra arida (D. D. Keck) B. G. Baldwin, Novon. 9: 467. 1999.

Hemizonia arida D. D. Keck, Aliso 4: 109. 1958

Annuals, 20–80 cm. Stems ± solid. Leaves: proximal blades toothed to entire, faces hispid-hirsute and stipitate-glandular. Heads in panicu-liform arrays. Bracts subtending heads usually not overlapping each involucre. Phyllaries ± evenly stipitate-glandular, including margins and apices, with non-glandular, non-pustule-based hairs as well. Paleae in 1 series. Ray florets (4–)8(–10); laminae deep yellow, 5–7 mm. Disc florets 17–25, all or mostly functionally staminate; anthers yellow or brownish. Pappi usually 0, rarely of 1–5 linear to setiform scales 0.1–0.6 mm. 2n = 24.

Flowering Apr–Nov. Washes, edges of springs and seeps, and adjacent slopes, cliffs, or ledges, often in ± alkaline, sandy, gravelly, or clayey soils; of conservation concern; 600–1000 m; Calif.

Deinandra arida is known only from Red Rock and Last Chance canyons and associated tributaries in the El Paso Mountains, western Mojave Desert. Depauperate specimens resemble D. kelloggii, which also has been documented from the Red Rock Canyon area.


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