Astragalus lentiginosus var. albifolius |
Astragalus lentiginosus var. australis |
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northern freckled milkvetch, Owens Valley milkvetch, white leaf milk vetch |
freckled milkvetch, southern freckled milkvetch |
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Habit | Plants perennial, halophyte, 30–100 cm. | Plants perennial (short-lived), clump-forming, 25–40(–60) cm. |
Stems | decumbent and ascending. |
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Leaves | 2–9 cm; leaflets (9 or)11–17(–21), blades oblanceolate, elliptic, or narrowly oblong, (3–)5–15(–18) mm, apex obtuse or subacute. |
(5–)6–17 cm; leaflets (13 or)15–21(or 23), blades usually obovate, broadly elliptic, or rhombic-ovate, rarely suborbiculate, (4–)6–25 mm, apex emarginate or retuse. |
Racemes | (9–)12–35-flowered, crowded into subglobose or cylindric heads, short and compact in fruit; axis obscured, (0.5–)1–4 cm in fruit. |
loosely (10–)15–33-flowered, lax and open in fruit; axis (3.5–)4–12 cm in fruit. |
Peduncles | (1–)1.5–6.5 cm. |
3–7(–9) cm. |
Flowers | 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. |
(13.2–)14.5–18 mm; calyx (5.3–)6.4–10.8 mm, tube (4.5–)4.8–7 mm, lobes (0.8–)1.6–3.8 mm; corolla pink-purple, sometimes pale. |
Legumes | 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. |
green or faintly mottled becoming stramineous or purplish, narrowly to broadly ovoid-acuminate or broadly lanceoloid-acuminate, slightly or greatly inflated, 12–22 × (4–)5–13(–15) mm, bilocular, thinly papery, usually glabrous, rarely sparsely pubescent; beak 4–8 mm, unilocular. |
Seeds | 10–15. |
18–22. |
2n | = 22. |
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Astragalus lentiginosus var. albifolius |
Astragalus lentiginosus var. australis |
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Phenology | Flowering Apr–Jul. | Flowering Feb–May. |
Habitat | Saline, summer-dry flats about seepage areas in lower foothills, on clay soils moist in springtime. | Open desert, sandy playas and outwash fans, plains, washes in foothills of desert mountains, with Larrea, Carnegiea gigantea, in yucca-grasslands. |
Elevation | 600–1500 m. (2000–4900 ft.) | 600–1300 m. (2000–4300 ft.) |
Distribution |
CA |
AZ; NM; TX; Mexico (Chihuahua, Sonora) |
Discussion | 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.) |
Variety australis is common and abundant in southeastern Arizona and southwestern New Mexico, grading into var. yuccanus to the north in Arizona. Eastward it extends to far western trans-Pecos Texas and becomes similar to var. diphysus. (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: Rev. N.-Amer. Astragalus, 124. (1923) | Barneby: Leafl. W. Bot. 4: 117, plate 3, figs. 15–19. (1945) |
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