Astragalus lentiginosus var. latus |
Astragalus lentiginosus var. australis |
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freckled milkvetch, schell creek milkvetch |
freckled milkvetch, southern freckled milkvetch |
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Habit | Plants perennial, 5–17 cm. | Plants perennial (short-lived), clump-forming, 25–40(–60) cm. |
Stems | usually ascending, rarely prostrate. |
decumbent and ascending. |
Leaves | (4–)6–13 cm; leaflets 11–17(–23), blades broadly obovate, ovate, or broadly oblanceolate, (4–)6–15 mm, apex shallowly notched or obtuse. |
(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 | shortly and loosely 5–12(–18)-flowered, short and compact in fruit; axis 0.7–2(–4) cm in fruit. |
loosely (10–)15–33-flowered, lax and open in fruit; axis (3.5–)4–12 cm in fruit. |
Peduncles | 1.5–6 cm. |
3–7(–9) cm. |
Flowers | (11.3–)15–19 mm; calyx (6.5–)7–12.5 mm, tube (4.5–)5.6–8.2 mm, lobes (1.4–)2–4 mm; corolla pink-purple. |
(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 | green, red-mottled, becoming stramineous, plumply ovoid or subglobose, strongly inflated, 1–2.5 × 0.7–1.6 cm, leathery, glabrous; beak 2.5–5 mm, bilocular. |
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 | (12–)22–28. |
18–22. |
2n | = 22. |
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Astragalus lentiginosus var. latus |
Astragalus lentiginosus var. australis |
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Phenology | Flowering May–Jul. | Flowering Feb–May. |
Habitat | Open, gravelly slopes in timber belt. | Open desert, sandy playas and outwash fans, plains, washes in foothills of desert mountains, with Larrea, Carnegiea gigantea, in yucca-grasslands. |
Elevation | (1700–)2200–3000 m. ((5600–)7200–9800 ft.) | 600–1300 m. (2000–4300 ft.) |
Distribution |
NV |
AZ; NM; TX; Mexico (Chihuahua, Sonora) |
Discussion | Variety latus is known from the Schell Creek and Egan ranges in White Pine County. (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 | ||
Synonyms | A. diphysus var. latus | |
Name authority | (M. E. Jones) M. E. Jones: Rev. N.-Amer. Astragalus, 125. (1923) | Barneby: Leafl. W. Bot. 4: 117, plate 3, figs. 15–19. (1945) |
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