Astragalus lentiginosus var. variabilis |
Astragalus lentiginosus var. albifolius |
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freckled milk vetch, victorville freckled milkvetch |
northern freckled milkvetch, Owens Valley milkvetch, white leaf milk vetch |
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Habit | Plants usually short-lived perennial, sometimes annual, (4–)10–40 cm, herbage usually cinereous, sometimes green or silky-canescent. | Plants perennial, halophyte, 30–100 cm. |
Stems | diffuse and ascending; ashy canescent or green. |
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Leaves | (2.5–)4–13 cm; leaflets (7–)11–21(–25), blades obovate-cuneate to broadly oblanceolate or rhombic-elliptic, 4–15(–17) mm, apex usually obtuse or emarginate, rarely acute or subacute. |
2–9 cm; leaflets (9 or)11–17(–21), blades oblanceolate, elliptic, or narrowly oblong, (3–)5–15(–18) mm, apex obtuse or subacute. |
Racemes | loosely (10–)12–25-flowered, lax and open in fruit; axis (3–)4–15(–17) cm in fruit. |
(9–)12–35-flowered, crowded into subglobose or cylindric heads, short and compact in fruit; axis obscured, (0.5–)1–4 cm in fruit. |
Peduncles | 3–8(–9) cm. |
(1–)1.5–6.5 cm. |
Flowers | 11.1–15 mm; calyx 4.7–6.5 mm, tube 3.7–5.2 mm, lobes 1–1.4(–1.5) mm, adaxial pair usually shortest; corolla pink- or magenta-purple. |
8.2–11.5 mm; calyx 5–7.3 mm, tube 3.2–4.5 mm, lobes 1.5–2.8 mm; corolla whitish, sometimes with purple veins, or pink-purple with white wing tips. |
Legumes | pale green or mottled becoming stramineous, obliquely ovoid or subglobose, bladdery-inflated, (12–)15–27(–30) × 8–14(–15) mm, bilocular, stiffly papery, opaque, sparsely strigulose to densely and canescently strigose-villosulous; beak (3–)4–9 mm, unilocular. |
pale green and purple-mottled becoming stramineous, plumply ovoid-acuminate, bladdery-inflated, 9–17 × 8–14 mm, papery-membranous, subtranslucent, strigulose; beak decurved, triangular, 3–5 mm, unilocular. |
Seeds | 23–29. |
10–15. |
2n | = 22. |
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Astragalus lentiginosus var. variabilis |
Astragalus lentiginosus var. albifolius |
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Phenology | Flowering (Feb–)Mar–Jun. | Flowering Apr–Jul. |
Habitat | Sandy flats, washes, desert playas, sometimes on dunes, usually with Larrea. | Saline, summer-dry flats about seepage areas in lower foothills, on clay soils moist in springtime. |
Elevation | 100–1000(–2100) m. (300–3300(–6900) ft.) | 600–1500 m. (2000–4900 ft.) |
Distribution |
CA; NV |
CA |
Discussion | Variety variabilis is common and locally abundant in the southern and southwestern Mojave Desert, replacing var. fremontii, which is usually found to the north and east. Vestiture varies from ashy white to greenish. To the north in southern Inyo County, California, it intergrades with var. fremontii to the point that differentiation of the varieties is subjective. At low elevations in the central Mojave Desert it grades into var. coachellae. It also occurs on the floor of the upper San Joaquin Valley in Kern County, California, where it closely resembles var. nigricalycis except for the purple flowers. White-canescent plants of this variety also occur in Nye County in Nevada, west of Beatty. R. C. Barneby (1964) discussed intergradient populations more thoroughly. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety albifolius was described as an elongate, ungainly, trailing or scrambling halophyte (D. Isely 1998); it occurs at the eastern base of the Sierra Nevada in Inyo County near Big Pine and Lone Pine, near Muroc in Kern County, and near Lancaster in Los Angeles County. Astragalus albifolius (M. E. Jones) Abrams is an illegitimate later homonym of A. albifolius Freyn & Sintenis 1893. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Name authority | Barneby: Leafl. W. Bot. 4: 123, plate 4, figs. 1–8. (1945) | M. E. Jones: Rev. N.-Amer. Astragalus, 124. (1923) |
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