Plant Database

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Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Arrangement: Alternate
Fruit Type: Legume
Size Notes: "Stems several or numerous, erect and ascending in clumps, (2) 2.5-4.5 dm. long." (bibref: 1813).
Leaf: "Stipules membranous, 4-9 mm. long, shortly adnate to the petiole-base, the lowest early becoming papery, decurrent around half to nearly the whole stem's circumference, the median and upper ones narrower, with triangular or lance-acuminate, erect or deflexed blades, their margins commonly beset with a few minute processes; leaves 7-13 (16) cm. long, the lower ones slender-petioled, the upper subsessile, with (13) 17-27 ovate, oblong, lance-oblong, or broadly elliptic, retuse or obtuse, flat, thin-textured leaflets 6-26 mm. long." (bibref: 1813).
Flower: "Peduncles erect, (4) 10-18 cm. long, equaling or commonly surpassing the leaf; racemes (4) 7-22-flowered, the flowers subcontiguous, ascending or subhorizontal at anthesis, the axis early elongating, (2) 3-8 cm. in fruit; bracts membranous, lanceolate or ovate-acuminate, 1.5-3.5 mm. long; pedicels at anthesis slender, 1-1.5 mm. long, in fruit ascending, clavately thickened, 2.5-5 mm. long; bracteoles nearly always 2; calyx 6.9-10.3 mm. long, finely pilosulous with black, fuscous, or partly white hairs, the oblique disc (0.8) 1-1.5 mm. deep, the membranous, subtumid, deeply campanulate to subcylindric tube 5.2-8 mm. long, 3.5-4.4 mm. in diameter, strongly convex dorsally but not gibbous basally, the broadly triangular-subulate to lanceolate teeth 1.6-2.8 mm. long, the ventral pair commonly broadest, the whole becoming papery, fragile, irregularly circumscissile; petals ochroleucous, immaculate; banner recurved through about 45 degrees, broadly rhombic-elliptic or -oblanceolate, 15.5-22 mm. long, 6.2-10.6 mm. wide; wings 13.5-20.2 mm. long, the claws (5.6) 6.5-8.6 mm., the oblong-oblanceolate, obtuse or obliquely emarginate, nearly straight blades 9-13.2 mm. long, 2.7-3.5 mm. wide; keel 11-13.1 mm. long, the claws 5.5-8 mm., the half-obovate blades 5.3-7.7 mm. long, 2.8-3.5 mm. wide, abruptly incurved through 90 degrees to the bluntly deltoid apex; anthers 0.55-0.75 mm. long." (bibref: 1813).
Fruit: "Pod erect, sessile, obliquely ovoid or oblong-ovoid, 1.3-1.8 cm. long, 5-6 mm. in diameter, obtuse at base, abruptly contracted distally into a short, pungently cuspidate beak, straight or a trifle incurved, a little dorsiventrally (in some dried specimens apparently laterally) compressed, bicarinate by the thick, prominent sutures, esulcate, the green, fleshy, glabrous valves becoming brownish-stramineous, stiffly leathery or subligneous, transversely rugulose-reticulate and often wrinkled lengthwise, not inflexed; ovules 14-18; seeds brown, smooth but punctate, 2.5-3.5 mm. long." (bibref: 1813).

Bloom Information

Bloom Color: White
Bloom Time: May , Jun , Jul
Bloom Notes: "White-flowered." (bibref: 1813).

Distribution

USA: ID , UT
Native Distribution: "Not rare in southwestern Idaho in the valleys of the Weiser, Payette, and Boise Rivers, east to the head of Camas Creek in Camas County, north just across the crest of the Sawtooth Range in Custer County, and apparently isolated to the south of the Snake River in the Goose Creek Mountains, Cassia County, and at the west base of Mt. Nebo in eastern Juab County, Utah." (bibref: 1813).
Native Habitat: "Brushy slopes, terraces and benches along canyons, or on dry flats and gently rolling hill country among sagebrush, in alluvial clays and gravels of both granitic and basaltic origin, 2700-6000 feet." (bibref: 1813).

Bibliography

Bibref 1813 - Atlas of North American Astragalus (1964) Barneby, Rupert C.

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Additional resources

USDA: Find Astragalus adanus in USDA Plants
FNA: Find Astragalus adanus in the Flora of North America (if available)
Google: Search Google for Astragalus adanus