Astragalus robbinsii (Oakes) A. Gray

Atelophragma robbinsii (Oakes) Rydb. Bull. Torrey Club 55: 124. 1928.
Phaca Robbinsii Oakes, Mag. Hort. Hovey 7: 181. 1841.
Astragalus Robbinsii A. Gray. Man. ed. 2. 98. 1856.
Tragacantha Robbinsii Kuntze. Rev. Gen. 947. 1891.
Astragalus labradoricus Robbinsii M. E. Jones, Rev. Astrag. 134. 1923.
A perennial, with a cespitose rootstock; stems 2-4 dm. long, slender, decumbent at the base, sulcate, glabrous or nearly so; leaves ascending, 5-8 cm. long; stipules ovate or lanceolate, 4—5 mm. long; leaflets 9-13, elliptic or oblong, rounded or slightly retuse at the apex, glabrous above, sparingly strigose beneath; peduncles 10-15 cm. long; racemes 2-3 cm. long, in fruit 5-10 cm. long; bracts scarious, lanceolate; pedicels 1 mm. long; calyx sparingly black-hairy; corolla white, 8 mm. long; banner obovate, slightly notched, moderately arched; wings nearly as long, the blade oblong, falcate, with a long basal auricle; keel-petals shorter, the blade broadly lunate, more strongly arched towards the obtuse apex; pod stipitate, sparingly and minutely black-hairy, the stipe 4 mm. long, the body lunate, 12-15 mm. long, 4 mm. wide, abruptly acute at each end, the lower suture straight or slightly concave, the septum about 0.25 mm. wide, the cross-section obovate; seeds obliquely reniform, 2.5 mm. long.
Type locality: On the banks of Onion [Winooski| River, near Burlington. Vermqjit.
Distribution: Known only from the type locality.