146 LEGUMINOS &. ASTRAGALUS. 
flowered; calyx slightly pubescent, campanulate, its acuminate teeth 
about equalling the tube; petals 8-10 lines long, yellowish or whitish; pod 
deflexed, chartaceous, linear, more or less curved, compressed, 2-celled by 
the intrusion of the dorsal suture, the ventral suture acute, 6-10 lines long 
by 4% line broad, black when mature. In forests at Glendale, south- 
western Oregon. 
A. malacus Gray Proc. Am. Acad. vii, 336. Villous-hirsute with lon 
spreading hairs: stems rather stout, from a perennial root: leaflets 11-17, 
obovate, retuse, 4-8 lines long: peduncles exceeding the leaves, bearing a 
rather loose spike of several to many flowers; calyx cylindrical, pubescent, 
with dark-colored hairs, the slender teeth much shorter than the tube, but 
little shorter than the corolla: pods pendulous or spreading, lunate-lanceo- 
late, an inch long, 3-4 lines broad, densely long-hairy, turgid and sulcate 
on the back, sharp-edged ventrally, many-seeded. On alkaline plains, 
southeastern Oregon to Nevada and Colorado. 
A. arrectus Gray I. c. viii, 280. Somewhat cinereous-puhescent or 
nearly glabrous: stems 1-2 feet high from a perennial root, erect, sulcate, 
simple or branched: stipules distinct, scarious; leaflets 19-25, ovate or 
narrowly oblong, obtuse or retuse, 6-8 lines long: racemes on long pedun- 
cles, loosely rather few-flowered; flowers ochroleucous, 7 lines long; calyx 
tubular-campanulate, pubescent with black hairs, its teeth short and slen- 
der: pods erect upon spreading or somewhat deflexed pedicels, coriaceous, 
subglabrous, oblong, 8-12 lines long, nearly straight, cuspidate, abruptly 
narrowed at base into a stipe as long as the calyx, with a deep dorsal sul- 
cus and somewhat carinate ventral edge, 2-celled, many-seeded. Eastern 
Washington to Idaho and Nevada. 
A. obsecurus Watson Bot. King. 69. Somewhat canescent, with a 
minute appressed pubescence : stems 6-12 inches high, numerous, slender, 
ascending; from a perennial root: stipules small, triangular, somewhat ad- 
nate to the petiole; leaflets 5-15, linear to oblong, 2-5 lines long, obtuse or 
acute: peduncles exceeding the leaves: racemes 5-15-flowered, loose or 
capitate, calyx pubescent with black hairs, the campanulate tube twice 
longer than the acute teeth, petals 6 lines long, ochroleucous or tinged 
with violet, the upper one orbicular, longer than the entire lateral ones 
and arched keel; pods terete, with a narrow dorsal sulcus, sessile, charta- 
ceous, erect, 10-15-ovuled. Eastern Oregon to Nevada. 
§ 7. SuccuMBENTES Gray 1. ec. vi, 200. Pod chartaceous- 
coriaceous, sessile, strongly compressed, faleate upward, bicari- 
nate and deeply suleate on the back, the ventral suture promi- 
nent and acute. 7 
A. suecumbens Dougl. Hook. Fl.i, 151. Hirsute throughout: stems 
numerous, from the crown of a perennialroot, decumbent, branching, 8-15 
inches long: stipules small, oblong, acuminate, free and distinct; leaflets 
11-15, obovate to oblong, 6 lines long or less; peduncles stout. shorter than 
the leaves; racemes short, dense, many-flowered; calyx cylindrical, loosely 
hirsute, its triangular acuminate teeth shorter than the tube: petals 8-10 
lines long, nearly equal: pods glabrous, linear-lanceolate, falcate, 2 inches 
long, erect on spreading pedicels, bicarinate and deeply sulcate on the 
back, the ventral suture prominent, acute, strongly compressed, many- 
ovuled. On rocky or sandy hillsides along the Columbia river above The 
Dalles. 
§ 8. GaLrecirorMEs Gray 1. c. Pod exsert-stipitate, pendent 
coriaceous or cartilaginous-chartaceous, straight, narrow, more or 
less triangular, very deeply sulcate dorsally, the suture intruded 
to the middle or beyond. 
