Astragalus lentiginosus var. salinus |
Astragalus lentiginosus var. oropedii |
|
---|---|---|
harney milkvetch, sagebrush milk vetch, salty freckled milkvetch, salty loco milkvetch |
freckled milkvetch, Kaibab Plateau milkvetch |
|
Habit | Plants perennial, 6–30(–45) cm. | Plants perennial, (10–)20–80 cm. |
Stems | ascending to erect, mostly unbranched. |
decumbent or weakly ascending, flexuous or zigzag in age, glabrous or glabrate. |
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. |
5–15 cm; leaflets 15–21(–25), blades broadly oblong-elliptic, ovate-oblong, or suborbiculate, 5–20(–25) mm, apex rounded, truncate, or retuse. |
Racemes | 10–25-flowered, floriferous from middle to distalmost nodes, short and compact in fruit; axis 1.5–4(–9) cm in fruit. |
shortly (8–)10–25-flowered, compact in fruit; axis little elongating, 1.5–4(–5) cm in fruit. |
Peduncles | 2–4.5(–5) cm. |
(2–)3–10 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. |
(12.5–)13.2–20 mm; calyx 7.5–10.8 mm, tube (4.5–)5–7.5 mm, lobes (2.5–)3–5 mm; corolla purple or pale pink-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, obliquely ovoid or semi-ovoid, ± strongly inflated, 13–25(–30) × 6.5–14 mm, ± bilocular, stiffly papery, glabrous; beak 5–8 mm, unilocular. |
Seeds | (7–)16–25. |
20–33. |
2n | = 22. |
|
Astragalus lentiginosus var. salinus |
Astragalus lentiginosus var. oropedii |
|
Phenology | Flowering Apr–Jun. | Flowering Jun–Sep. |
Habitat | Saline flats and playas upward to mountain slopes in sagebrush, oak, and other montane communities. | Openings in ponderosa pine forests. |
Elevation | 700–2600 m. (2300–8500 ft.) | 2100–2500 m. (6900–8200 ft.) |
Distribution |
CA; ID; MT; NV; OR; UT; WY; BC |
AZ |
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 oropedii is locally common but apparently confined to the Kaibab Plateau, especially the North Rim and upper levels of the northern wall of the Grand Canyon in Coconino County. Specimens with thin-textured, subdiaphanous fruits that occur within or near known localities of var. oropedii have been tentatively placed with var. vitreus. (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: 135. (1945) |
Web links |