148 . LEGUMINOS 2. ASTRAGALUS. 
hairs: stems short, depressed: stipules oblong, acuminate, appressed, 
membranaceous: leaflets 13-15, linear-oblong: peduncles as long as the 
leaves or shorter, 3-4-flowered; bracts linear, as long as the cylindrical 
elongated blackish-hairy calyx; teeth of the calyx one-third as long as the 
tube: pods oblong-ovate, attenuate above, incurved, silky-pubescent. 
Southern Idaho aad Wyoming. 
Serres IJ. Puaca L. Gen. n. 891, as genus. Pod 1-celled, 
neither suture being inflexed, nor the ventral more intruded than 
the dorsal. 
§ 9. Errocarpl Gray Proc. Am. Acad. vi, 212. Pod very 
woolly, short turgid, coriaceous, more or less incurved, acumi- 
nate or pointed, sessile. Stems prostrate, from a stout perennial 
root. 
A. inflexus Dougl. in G. Don. Gen. Syst. ii, 256. Soft-woolly 
throughout: stems 1-2 feet long, prostrate, branching: stipules subulate or 
acuminate from a rather broad base, 6-8 lines long: leaflets 21-25, oblong 
or oblanceolate, about 6 lines long, densely silky peduncles not exceeding 
the leaves; flowers purple, rather numerous, in short capitate spikes: 
bracts setaceous, 6-8 lines long; calyx about equalling the lateral petals, 
its subulate teeth about as long as the tube; upper petal longer than the 
lateral ones, pubescent on the back: pods ovate, acuminate, densely silky- 
villous, at length strongly incuryed, l-celled but at maturity the dorsal 
suture becomes.inflexed so as to nearly meet the ventral, but not forming 
a por. On sandy banks and plains, along the Columbia river above 
The Dalles. 
A. doryenioides Dougl. in G. Don Gen. Syst. ii, 258 (2). Appressed- 
silky with white hairs, stems short, depressed, several from the crown of a 
stout perennial root 1-3 inches long: stipules subulate, setaceous-acumi- 
nate, 6-9 lines long: leaves numerous; leaflets usually 13, 6-10 lines long 
by 2 lines broad, oblong to oblanceolate, acute or acuminate, densely silk 
both sides; peduncles shorter than the leaves; capitately few-flowered; — 
calyx tubular, 4-5 lines long, its subulate teeth about half as long as the 
tube; corolla 8-10 lines long, persistent, bright purple: pods ovate, acumi- 
nate, at length strongly incurved, densely villous, 10-12 lines long, 1-celled, 
the dorsal suture at maturity strongly intruded, the ventral rounded. On 
rocky hillsides, eastern Oregon and Washington. 
A. leucoeystis Greene Eryth. iti, 76. (A. lanocarpus Sheld. 1. ¢. 144), 
Woolly-pubescent with long white hairs: stems cespitose, very short, from 
a thick perennial root, branching and forming a close mat 4-8 inches in 
diameter: leaves numerous, 3-6 inches long, the rachis channelled; leaf- 
lets 7-11, usually absent from the lower half of the rachis, narrowly obo- 
vate to oblong, acute or obtuse, 3-6 lines long, stipules tria.igular-ovate, 
acuminate, sheathing peduncles equalling the leaves, 3-5-flowered; calyx 
narrowly cylindrical, with unequal teeth, one-fifth as long as the tube; - 
corolla ochroleucous tipped with purple, 10-12 lines long: pods 8-10 lines 
long, coriaceous, white-pubescent with long stiff hairs, sessile, oblong, 
slightly arcuate, 1-celled, but with the ventral suture somewhat intruded, 
lined within with cobwebby hairs which traverse the cavity, few to many- 
seeded. On dry hillsides and plains, eastern Oregon and Washington. 
A. Purshii Dougl. Hook. Fl. i, 152. Very hirsute, stems short, diffuse: 
leaflets 13-17, oblong; stipules lanceolate, acuminate: peduncles half as 
long as the leaves: flowers in loose heads, spreading; bracts linear-lanceo- 
late, twice as long as the pedicels; calyx elongated, membranaceous, its 
subulate teeth half as long as the tube, equal; corolla yellow, 18 lines 
long, upper petal obovate, equalling the narrow lateral ones, keel purple- 
tipped; ovary subsessile, linear, very hirsute. Brit. Columbia to Califor- 
nia and Utah. 
