Astragalus lentiginosus var. vitreus |
Astragalus lentiginosus var. chartaceus |
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freckled milkvetch, glass freckled milkvetch |
broadleaf milkvetch, cobweb milkvetch |
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Habit | Plants perennial, 15–40 cm. | Plants perennial, 10–35 cm. |
Stems | glabrous or glabrate. |
diffuse and incurved-ascending, often red-tinged. |
Leaves | 4.5–10 cm; leaflets (7–)13–19, blades obovate-cuneate or oblong-obovate, (5–)7–17(–21) mm, apex obtuse or truncate-emarginate. |
(2.5–)4–11 cm; leaflets (9 or)11–23, blades elliptic-oblanceolate, broadly oblong-oblanceolate, or obovate, (3–)5–17(–20) mm, apex obtuse or emarginate. |
Racemes | loosely (10–)15–27-flowered, lax and open in fruit; axis 4–8.5 cm in fruit. |
(5–)10–20-flowered, flowering from middle and distally, short and compact in fruit; axis (0.5–)1.5–4(–5.5) cm in fruit. |
Peduncles | 4–9.5 cm. |
(1–)2.5–6(–7.5) cm. |
Flowers | 13.2–17 mm; calyx 6.5–8 mm, tube 4.6–5.7 mm, lobes (1.5–)1.7–2.3 mm; corolla pink-purple or lavender with white wing tips. |
(12.5–)15–18.2 mm; calyx (6.2–)7.5–10.5 mm, tube (4.6–)5.2–6.7 mm, lobes 1.4–3.8 mm; corolla bright pink-purple with pale, striate eye. |
Legumes | pale green and unmottled turning pallid, usually broadly ovoid, rarely lunately lanceoloid-acuminate, usually strongly inflated, rarely less so, 15–25 × (7–)9–15 mm, papery-membranous, subtranslucent, lustrous, glabrous; beak triangular, short, unilocular. |
green, often red-mottled, becoming stramineous, usually strongly incurved, ovoid, lanceoloid-ovoid, or ovoid-acuminate, moderately inflated, 15–30(–40) × (7–)9–15 mm, bilocular, stiffly papery or almost leathery, usually glabrous, rarely puberulent; beak well-defined, triangular or deltoid, 6–15 mm, unilocular. |
Seeds | 21–31. |
24–34(–38). |
2n | = 22. |
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Astragalus lentiginosus var. vitreus |
Astragalus lentiginosus var. chartaceus |
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Phenology | Flowering Apr–Jun. | Flowering May–Jul. |
Habitat | Gullied badlands and desert flats, on sand or clay derived from sandstone or limestone, on volcanic gravel. | Sagebrush, pinyon-juniper, and mixed desert shrub communities, on alluvial silt, igneous gravel. |
Elevation | 800–1500(–2000) m. (2600–4900(–6600) ft.) | 1400–2200 m. (4600–7200 ft.) |
Distribution |
AZ; UT |
NV; UT |
Discussion | Variety vitreus is found in the valleys of the upper Virgin River and Kanab Creek, southward to the northern slope of the Kaibab Plateau, and Toroweap and House Rock valleys in eastern Washington and western Kane counties in Utah, and northern Mohave and northwestern Coconino counties in Arizona. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety chartaceus is widespread from central to western Utah into northeastern and central Nevada, there intergrading with vars. fremontii, kennedyi, and toyabensis. S. L. Welsh (2007) discussed the problems of including this variety in an expanded var. diphysus and its complex relationships to other varieties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | A. araneosus, A. lentiginosus var. araneosus | |
Name authority | Barneby: Leafl. W. Bot. 4: 119, plate 3, figs. 30–33. (1945) | M. E. Jones: Proc. Calif. Acad. Sci., ser. 2, 5: 673. (1895) |
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