Difference between revisions of "Astragalus didymocarpus var. dispermus"
Fl. Calif. 2: 376. 1936.
Common names: Wickenburg milkvetch
Basionym: Astragalus dispermus A. Gray Proc. Amer. Acad. Arts 13: 365. 1878
Treatment appears in FNA Volume 11.
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Latest revision as of 17:54, 12 March 2025
Stems diffuse, weakly ascending, or prostrate, (1.5–)4–27 cm. Leaves 1–3.5 cm; leaflets (7 or)9–15, blades 2–8 mm. Racemes 7–20-flowered; axis 0.3–1.2 cm. Flowers (3.4–)4.3–5.4 mm; calyx tube 1.7–2.3 mm, lobes subulate or subulate-setaceous, (1.3–)1.6–2.4 mm, hairs mostly white, sometimes also black; corolla keel abruptly incurved, (3.4–)3.8–4.5 mm, apex usually bluntly deltate, sometimes obscurely beaklike. Legumes 2.3–4 × 1.6–2.5 mm, deeply sulcate, strongly wrinkled transversely or diagonally, strigulose-hirsutulous. 2n = 26.
Phenology: Flowering Feb–May.
Habitat: Foothills of desert mountains, on arid sandy soils, with Larrea.
Elevation: 30–1100(–1300) m.
Distribution
Ariz., Calif., Nev., Mexico (Baja California).
Discussion
Variety dispermus occurs from the western edge of the California deserts across southern Nevada to central and southern Arizona.
Selected References
None.
Lower Taxa
None.