152 LEGUMINOS^- asxragalus. 



A. sclerocarpus Gray 1. c. Cinereous with a very short appressed 

 pubescence, much branched: leaflets 13-19, linear, 4-6 lines long : pedun- 

 cles exceeding: the leaves, loosely rather few-flowered; calyx cylindrical, 

 pubescent with black hairs, 3 lines long, its short triangular teeth not half 

 as long as the tube: pods canescent-puberulent, lanceolate, acuminate, 

 falcate or nearly hamate, an inch or more long, attenuate at base to a stipe 

 an inch or more long. On sandy banks and plains, along the Columbia 

 river above The Dalles. 



A. speirocarpus Gray 1. c. Stems slender, decumbent or ascending, 

 10-12 inches long, cinereous: stipules very small, triangular, obtuse; 

 leaflets 9-13, oblong or cuneate, obtuse or refuse, 1-4 lines long, pubescent 

 both sides : peduncles about equalling the leaves, loosely rather many- 

 flowered ; flowers yellowish -white, on very short pedicels, soon deflexed; 

 calyx cylindrical, 3-4 lines long, pubescent with black hairs, its short tri- 

 angular teeth not half as long as the tube : pods linear, acuminate, pubes- 

 cent, coiled into a short spiral, attenuate at base to a stipe a little longer 

 than the calyx. Along the Columbia river above The Dalles. 



Var. falciformis Gray Eot. Cal. i, 152. Stipe filiform, 6-9 lines long, 

 nearly the length of the thinner-walled and less turgid falcate or merely 

 hooked pod. Brit. Columbia to Washington, Nevada and California. 



A. (xibbsii Kell. Proc. Cal. Acad, ii, 161. Cinereous-pubescent: stems 

 many from a thick perennial root, rather stout, 10-12 inches high: leaflets 

 11-15, oblong with a cuneate base, truncate or retuse, 6-8 lines long: pe- 

 duncles exceeding the leaves ; flowers numerous, in a rather dense raceme, 

 reflexed on short spreading pedicels; calyx cylindrical, gibbous at base, 

 5-6 lines long, the triangular teeth not more than % as long as the tube : 

 pods linear, about an inch long, curved or annular, veiy acute, finely pu- 

 bescent, attenuate at base into a stipe twice as long as the calyx. Plains 

 and hillsides, eastern Oregon and Idaho to Nevada. 



§ 14. Homalobi Gray 1. c. Pod flattened or compressed, 

 straight, margined by the nerve-like sutures, coriaceous or char- 

 taceous, sometimes stipitate. 



A. collinus Dougl. in G. Don. Gen. Syst. ii, 256. Stems erect or dif- 

 fuse, 6-12 inches long, numerous, from a stout perennial root, grayish- 

 pubescent: leaflets 19-23, linear or oblong-linear, obtuse, attenuate at 

 base, 6-12 lines long; stipules very small, oblong, acuminate ; peduncles 

 twice the length of the leaves; flowers whitish, in dense oblong racemes 

 refracted on suberect pedicels ; calyx tubular, densely hirsute ; 4-6 lines long, 

 its triangular teeth about half as long as the tube : pods pubescent, linear- 

 oblong, attenuate at base to a stipe, somewhat turgid, an inch long with 

 the stipe reflexed. In rocky gulches and hillsides of the Blue Mountains 

 of Oregon. 



A. Californicus Greene Bull. Cal. Acad, i, n. 3, 157. Stems numerous, 

 from a stout perennial root, rather slender, 8-12 inches high, usually sim- 

 ple, minutely pubescent : leaves 2-4 inches long : stipules triangular, 2 

 lines long, nearly as broad ; leaflets 11-19, cuneate-oblong to linear, obtuse, 

 pubescent both sides with white hairs, 4-6 lines long by 1-3 broad, peti- 

 olulate: peduncles longer than the leaves; flowers ochroleucous, 6-8 lines 

 long, pendent, on erect pedicels in dense oblong racemes : bracts lanceolate 

 longer than the pedicels ; calyx tubular, 3-5 lines long, pubescent with 

 minute brownish hairs, its short triangular teeth about a line long: pods 

 1-2 inches long by 2 lines broad, acute, attenuate below to a slender stipe 

 as long as the calyx, strongly reticulated and very minutely pubescent, 

 compressed or somewhat turgid. In rich alluvial soil, valley of the Klam- 

 ath river near Yreka, California, no doubt in adjacent Oregon. 



A. Tweedy! Canby Bot. Gaz. xi, 150. Stems erect, 12-18 inches high, 



