Astragalus lentiginosus var. trumbullensis |
Astragalus lentiginosus var. kennedyi |
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freckled milkvetch, Mount Trumbull milkvetch |
Kennedy's freckled milkvetch, Kennedy's milkvetch |
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Habit | Plants perennial, 30–45(–65) cm, herbage green or subglabrescent. | Plants biennial or perennial (short-lived), (10–)15–40(–50) cm; herbage villosulous. |
Stems | decumbent and ascending. |
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Leaves | 2–9.5(–10.5) cm; leaflets (7–)13–17, blades broadly obovate to oblanceolate or elliptic, 5–15 mm, apex retuse to round or subacute, adaxial surface usually strigose to strigulose, sometimes glabrate or glabrous. |
4.5–12(–15) cm; leaflets (9–)15–21(or 23), blades obovate-cuneate to broadly oblong-oblanceolate, (5–)7–20 mm, apex obtuse, emarginate, or retuse. |
Racemes | loosely 4–15(–17)-flowered; axis elongating, 3–9.5 cm in fruit. |
loosely (10–)15–35-flowered, lax and open in fruit; axis (3.5–)5–12 cm in fruit. |
Peduncles | 4.5–7.5 cm. |
(3–)4.5–7.5 cm. |
Flowers | 13–17 mm; calyx 6.3–7.4 mm, tube 4.8–5.5 mm, lobes 1.7–2 mm; corolla pink- or red-purple, sometimes with pale or white wing tips. |
(11.8–)12.5–17 mm; calyx 6.1–8.8 mm, tube 4.1–5.7 mm, lobes 1.6–3.1 mm; corolla bright pink. |
Legumes | evidently persistent, stramineous or mottled, linear-oblong to oblong or narrowly ellipsoid, not or scarcely inflated, 17–32 × 4–5.5(–7.5) mm, ± bilocular, somewhat fleshy becoming leathery or stiffly papery, strigulose; beak 3–5 mm, unilocular; stipe 0.1–1 mm. |
stramineous, usually narrowly ovoid-acuminate, more rarely plumply so, bladdery-inflated, (20–)25–30 × 9–15 mm, papery-membranous, usually lustrous, usually glabrous, rarely puberulent; beak 5–9 mm, unilocular. |
Seeds | 14–28. |
(24–)26–36. |
2n | = 22. |
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Astragalus lentiginosus var. trumbullensis |
Astragalus lentiginosus var. kennedyi |
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Phenology | Flowering Apr (Sep). | Flowering Apr–Jun. |
Habitat | Sandstone outcrops and gravel, with Agave, Ephedra, Mortonia, Purshia, and other warm-desert shrubs. | Alkaline dunes, sandy valleys, dry stony knolls, sometimes on volcanic gravel or cinders. |
Elevation | 900–1800 m. (3000–5900 ft.) | 1100–1800 m. (3600–5900 ft.) |
Distribution |
AZ |
NV |
Discussion | Variety trumbullensis is restricted to Mohave County. It is closely related to vars. mokiacensis and palans, weakly differentiated by a series of features that intergrade insensibly but taken in combination are more or less diagnostic (as is true for most members of the lentiginosus complex). J. A. Alexander (2005) provided statistical evidence that this variety is indistinguishable from var. mokiacensis (as Astragalus mokiacensis), and he considered the two synonymous. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety kennedyi is a locally abundant endemic of west-central Nevada, blending with var. fremontii in the south. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Cystium kennedyi | |
Name authority | S. L. Welsh & N. D. Atwood: Rhodora 103: 81, fig. 3. (2001) | (Rydberg) Barneby: Leafl. W. Bot. 4: 121. (1945) |
Web links |