astragalus. LEGUMINOS/E. 147 



A. Howellii Gray Proc. Am. Acad, xv, 46. Cinereous-pubescent 

 throughout: stems erect, slender, 1-2 feet high, sparsely leafy ; stipules 

 linear-lanceolate, partly adnate, 2 lines long; leaflets li-31, oblong to lin- 

 ear, obtuse to retuse, 4-8 lines long; peduncles exceeding the leaves; 

 flowers white, on short spreading pedicels, soon deflexed, in a loose raceme ; 

 calyx campanulate, subgibbous at base, its subulate-setaceous teeth about 

 equalling the tube: pods straight, oblong-lanceolate, acuminate, attenuate 

 at base to a stipe, twice longer than the calyx, 2-celled by the intrusion of 

 the dorsal suture, the ventral suture prominently keeled, canescent, 

 several-ovuled. Drv hillsides and plains, Eastern Oregon near The Dalles. 



A. inisellus Watson Proc. Am. Acad, xxi, 449. Canescent with a short 

 appressed pubescence : stems numerous from a thick perennial root, de- 

 cumbent or ascending. 4-6 inches long: stipules triangular to broad-subu- 

 late, slightly connate ; leaflets 17-21, oblong to linear, 2-3 lines long, pu- 

 bescent beneath, soon glabrate above : peduncles about equalling or much 

 exceeding the leaves, few-flowered; flowers spreabing or reflexed, on very 

 short pedicels: calyx campanulate, its teeth nearly equalltng the tube : 

 pod linear, somewhat curved; attenuate below to a stipe a little longer 

 than the calyx, compressed, 2-celled by the intrusion of the dorsal suture, 

 the ventral suture rounded or acute, reflexed, finely pubescent. 8-10 lines 

 long. On sterile hillsides in the John Day valley at Mitchell, Oregon. 



A. racemosus Pursh Fl. 740. Appressed pubescent or glabrate: stems 

 1-2 feet high, rather stout, somewhat sulcate, very leafy: leaflets about 21, 

 elliptical, oblong or oval, obtuse, mucronate, smooth above, 6-8 lines long: 

 peduncles about the length of the leaves, loosely many-flowered; flowers 

 nodding and somewhat secund, calyx whitish-pubescent, strongly gibbous 

 at base, the setaceous teeth slightly shorter than the tube, equalling the 

 stipe: pods lance-oblong, an inch long, triangular, not 2-celled, very 

 smooth. Plains of Idaho to Kansas and the Northwest Territory. 



§ 9. Argophylli Gray Proc. Am. Acad, vi, 209. Pods mostly 

 thick-coriaceous and obcompressed, the intruded dorsal suture 

 more or less approaching the ventral, not 2-celled, pubescent. 



A. iodaiithus Watson Bot. King 70. Canescent with an appressed 

 hairy pubescence, or nearly glabrous with scattered hairs upon the petioles 

 and margins of the leaves ; stems decumbent, 6-10 inches long, from a 

 perennial root : stipules ovate-lanceolate, free or somewhat adnate to the 

 petiole ; leaflets 13-21, 2-5 lines long, obovate or orbicular, obtuse : pe- 

 duncles equalling the leaves ; spikes short, dense : flowers on short pedicels, 

 deep violet-purple or ochroleucous tinged with purple, the lateral and 

 upper petals 6-8 lines long, exceeding the obtuse keel, the somewhat 

 nigrescent campanulate calyx-tube twice longer than the subulate teeth : 

 pods 18 lines long, 3 lines broad, linear-oblong, acuminate, strongly arcu- 

 ate or hamate, sessile, nearly glabrous with a very sparse pubescence, 

 mottled, chartaceous, irregularly folded but usually with a deep dorsal 

 sulcus approximating the suture to the prominent ventral one, many- 

 seeded. Eastern Oregon to California. Nevada, Colorado and Montana. 



A. Beckwithii T. & G. Pac. R. R . ii. 120. Glabrous ornear'yso: 



stems 1-2 feet long, from perennial roots, diffusely spreading: stipules 

 ovate-lanceolate, adnate to the petiole : leaflets 13-25, 6 lines long, broadly 

 oval : flowers 5-8, in a short loose raceme, orchroleucous, 9 lines long ; calyx 

 nearly glabrous, its subulate teeth scarcely shorter than or exceeding the 

 campanulate tube: pods 1 inch long, glabrous, transversely rugulose, coria- 

 ceous, short stipitate, somewhat obcompressed, flattened dorsally with the 

 sutures slightly intruded, bisulcate ventrally with the prominent suture 

 acutely margined, many-seeded. Brit. Columbia to Southern Idaho. I 'to lit 

 Nevada and < 'alifornia. 



A. glareosus Dougl. Hook, Fl. i, 152. Silky-villous with incumbent 



