300 
PAPILIONACEAE. {Vor I. 
1o. Astragalus racemosus Pursh. Racemose Milk Vetch. (Fig. 2134.) 
11. Astragalus bisulcatus (Hook.) A. 
Gray. ‘Two-grooved Milk Vetch. 
(Fig. 2135.) 
Phaca bisulcata Hook. FI. Bor. Am. 1: 145. 
Astragalus bisulcatus A. Gray, Pac. R. 
Part 2,42. fl. z. 1860. 
sos Aa aa racemosus Pursh, Fl. Am. Sept. 740. 
1814. 
Erect or ascending, finely pubescent, branched 
at the base; stem somewhat zigzag, 1°-2° high. 
Stipules ovate-lanceolate, membranous, 2//—3// 
long; leaflets 17-21, elliptic or linear-oblong, 
acutish or mucronate, 10’’-15’’ long; peduncles 
equalling or exceeding the leaves; flowers yel- 
lowish-white, 8’’-9’’ long, in loose spike-like 
racemes; pedicels 1/’-2’’ long; pods linear-ob- 
long, imperfectly 2-celled by the intrusion of the 
dorsal suture, triangular in section, acute at 
each end, glabrous, stipitate, broadly sulcate, 
pendent, about 1/ long. 
Prairies, Nebraska and Colorado, north to the 
Northwest Territory. June-July. 
1833. 
R. Rep. 12: 
Rather stout, erect, nearly simple, 1°-3° high. 
Stipules membranous, ovate-lanceolate, acute, 4//— 
6’’ long; leaflets 17-27, oval or oblong, obtuse at 
the apex, narrowed at the base, 8’’-12’’ long; flow- 
ers deep purple, 7’’-8’’ long, in elongated narrow 
racemes; peduncles longer than the leaves; pod 1- 
celled, linear, stipitate, deflexed, pointed, glabrous 
at maturity, membranous, with 2 deep furrows on 
the upper side, 6’’—10’’ long. 
Nebraska and Colorado to Montana and the North- 
west Territory. June-Aug. 
12. Astragalus pectinatus (Hook. ) Doug]. 
Narrow-leaved Milk Vetch. 
(Fig. 2136.) 
Phaca pectinata Hook. F1. Bor. Am. 1:141. P/. 54. 1830. 
Astragalus pectinatus Dougl.; Hook. Fl. Bor. Am. 1: 
142. Assynonym, 1830. 
Ascending, much branched at the base or also 
above, 1°-2° high, finely canescent or glabrate. 
Stipules membranous, ovate-lanceolate, acute or 
acuminate, 4’’-6’’ long; leaflets 11-21, very nar- 
rowly linear, acute, '/-3 long; peduncles shorter 
than or exceeding the leaves; flowers yellow, 8’’-12’’ 
long, in loose spikes or spike-like racemes; stand- 
ard much longer than the wings and keel; pod nearly 
terete, 1-celled, sessile, oblong, pointed, coriaceous, 
glabrous, not furrowed, keeled along the upper 
suture, 6’/-8’’ long. 
Prairies, Nebraska and Colorado to the Northwest 
Territory. June-Aug. 
