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Groundcover Milkvetch

Astragalus humistratus var. humivagans (Rydb.) Barneby

Comprehensive Description

provided by North American Flora
Batidophaca humivagans Rydberg, sp.nov
Astragalus humistratus var. A. Gray, Proc. Am. Acad. 13: 369. 1878.
A perennial with a deep root and cespitose caudex; stems numerous, decumbent or prostrate, 2-4 dm. long, terete, branched, strigose-canescent ; leaves ascending, 3-5 cm. long; stipules deltoid or lance-deltoid, S-S mm. long, connate two thirds to three fourths their length, membranous, canescent; petioles 1 cm. long or less; leaflets oblong or elliptic, 5-15 cm. long, silvery-strigose on both sides; peduncles 5-7 cm. long; racemes at first short, in age elongate, 3-8 cm. long; bracts lance-linear, 5 mm. long; calyx silky-strigose, the tube 3 mm. long, the teeth subulate, 3 mm. long; corolla ochroleucous, 8 mm. long, similar to that of the preceding species; pod laterally compiessed above the middle, depressed and somewhat sulcate at the base, strongly arcuate, 12-15 mm. long, 4—5 mm. wide, strigose.
Type collected at Mokiak Pass, Arizona, in 1877, Palmer 108 (Gray Herb.). Distribution: Arizona, southern Utah, and New Mexico.
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bibliographic citation
Per Axel Rydberg. 1919. (ROSALES); FABACEAE; PSORALEAE. North American flora. vol 24(1). New York Botanical Garden, New York, NY
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