Astragalus lentiginosus var. salinus |
Astragalus lentiginosus var. antonius |
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harney milkvetch, sagebrush milk vetch, salty freckled milkvetch, salty loco milkvetch |
freckled milkvetch, Mount San Antonio milkvetch, San Antonio milk vetch |
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Habit | Plants perennial, 6–30(–45) cm. | Plants perennial, 7–30 cm, herbage cinereous or silvery-canescent. |
Stems | ascending to erect, mostly unbranched. |
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Leaves | 4–10 cm; leaflets (9 or)11–19, blades broadly obovate, obovate-cuneate, obcordate, or oblong to oblanceolate, 5–20 mm, apex usually retuse or emarginate, surfaces glabrate to densely strigulose, hairs appressed or subappressed. |
3–8 cm; leaflets 11–19(or 21), blades obovate or elliptic, 2.5–11 mm, apex obtuse or emarginate. |
Racemes | 10–25-flowered, floriferous from middle to distalmost nodes, short and compact in fruit; axis 1.5–4(–9) cm in fruit. |
10–15-flowered, short and compact in fruit; axis 0.5–4(–5) cm in fruit. |
Peduncles | 2–4.5(–5) cm. |
(1–)2–5.5 cm. |
Flowers | 9.5–11.5 mm; calyx 5–6.4 mm, tube 3.6–4.2(–4.6) mm, lobes 1.2–2.2 mm; corolla whitish, sometimes wings and keel with lavender tips. |
9–10.5 mm; calyx 4.2–5.5 mm, tube 3.2–4 mm, lobes 0.8–1.4 mm; corolla purple. |
Legumes | green or mottled becoming stramineous, obliquely ovoid or subglobose, strongly inflated, 14–26(–30) × (6–)7.5–14 mm, papery-membranous, translucent, glabrous or puberulent; beak 3–9 mm, unilocular. |
mottled becoming stramineous, plumply ovoid-acuminate or subglobose, bladdery-inflated, 14–22(–30) × 10–16(–18) mm, papery, strigulose; beak erect, triangular, 3–6 mm, unilocular. |
Seeds | (7–)16–25. |
20–26. |
2n | = 22. |
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Astragalus lentiginosus var. salinus |
Astragalus lentiginosus var. antonius |
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Phenology | Flowering Apr–Jun. | Flowering late Apr–Jul. |
Habitat | Saline flats and playas upward to mountain slopes in sagebrush, oak, and other montane communities. | Ponderosa pine forests. |
Elevation | 700–2600 m. (2300–8500 ft.) | 1500–2600 m. (4900–8500 ft.) |
Distribution |
CA; ID; MT; NV; OR; UT; WY; BC |
CA |
Discussion | Variety salinus, widespread in the northern and eastern portions of the Great Basin, occupies a crucial position in the Astragalus lentiginosus complex, serving to link many superficially disparate lines of differentiation (R. C. Barneby 1964). On the one hand, one can trace a sequence passing through var. floribundus to var. ineptus, and then to vars. antonius, idriensis, and sierrae. On the other hand, another strand leads through vars. lentiginosus and platyphyllidius to vars. chartaceus, diphysus, and finally australis. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety antonius, from the eastern end of the San Gabriel Mountains in eastern Los Angeles and adjacent San Bernardino counties, is the homologue of var. sierrae, from which it differs by its much denser pubescence and mostly flat leaflets (D. Isely 1998). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | A. salinus | |
Name authority | (Howell) Barneby: Leafl. W. Bot. 4: 86. (1945) | Barneby: Leafl. W. Bot. 4: 100, plate 2, figs. 7–9. (1945) |
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