Astragalus lentiginosus var. yuccanus |
Astragalus lentiginosus var. floribundus |
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yucca freckled milkvetch, yucca milkvetch |
Carson city milkvetch, floriferous freckled milkvetch, floriferous milk vetch, freckled milkvetch |
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Habit | Plants winter-annual or short-lived perennial, clump-forming, 15–60(–100) cm. | Plants perennial, 20–50 cm. |
Stems | erect and ascending. |
prostrate to weakly ascending, branched proximally. |
Leaves | (5–)7–16 cm; leaflets 13–21(–25), blades broadly elliptic, oval, rhombic-obovate, or obovate, (4–)6–21 mm, apex retuse or emarginate. |
3–8(–11) cm; leaflets 11–15(–19), blades obovate or oblanceolate, 5–15 mm, apex retuse, surfaces glabrate to densely strigulose, hairs appressed or subappressed. |
Racemes | loosely (12–)15–32-flowered, lax and open in fruit; axis early elongating, (4.5–)6–14 cm in fruit. |
(11–)15–30(–37)-flowered, short and dense, cylindric or globose in fruit; axis 1–4(–7) cm in fruit. |
Peduncles | (3–)5–10 cm. |
1–4(–7) cm. |
Flowers | 11–15.6 mm; calyx 6–7.5 mm, tube 4.4–5.7 mm, lobes (1.3–)1.5–2.4 mm; corolla white or ochroleucous, concolorous, sometimes fading pale bluish, petals poorly graduated, banner slightly longer than wings, wings and keel nearly equal length. |
8.8–11 mm; calyx 4–6.5 mm, tube 3–4 mm, lobes 0.6–1.4(–2) mm; corolla whitish, sometimes wings and keel with lavender tips. |
Legumes | stramineous, plumply ovoid-acuminate or subglobose, strongly inflated, 15–25(–32) × 10–18 mm, bilocular, papery-membranous, subtranslucent, usually glabrous, rarely minutely strigulose; beak 3–7 mm, unilocular. |
faintly mottled becoming stramineous, obliquely ovoid or subglobose, strongly inflated, (8–)12–21 × (6–)7–12 mm, thinly papery, translucent, glabrous or strigulose; beak 3–7 mm, unilocular. |
Seeds | 17–26. |
15–21(–25). |
2n | = 22. |
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Astragalus lentiginosus var. yuccanus |
Astragalus lentiginosus var. floribundus |
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Phenology | Flowering Feb–May. | Flowering May–Jun. |
Habitat | Open sandy plains, sandy or rocky washes, gulches in foothills of desert mountains, with Larrea and in yucca-grasslands. | Sagebrush communities, on sandy, granitic, or basaltic substrates. |
Elevation | 500–1100 m. (1600–3600 ft.) | 1100–1600(–2100) m. (3600–5200(–6900) ft.) |
Distribution |
AZ; NV |
CA; NV; OR |
Discussion | Variety yuccanus occurs in west-central Arizona, barely entering Nevada in the southern tip of Clark County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety floribundus is the only member of Astragalus lentiginosus in the Lake Tahoe area; it occurs along the eastern flanks of the Sierra Nevada, passing into var. ineptus in Mono County, and extends northward into southeastern Oregon, where it grades into var. salinus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Name authority | M. E. Jones: Contr. W. Bot. 8: 3. (1898) | A. Gray: Proc. Amer. Acad. Arts 6: 524. (1865) |
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