360 NORTH AMERICAN FLORA [Volume 24 



vate, retuse; wing-petals shorter, the blade oblong, somewhat arcuate, longer than the claw; 

 keel-petals much shorter and broader, rounded at the apex; pod sessile, ellipsoid, short-strigcs^ 

 with black hairs, about 1 cm. long, 6 mm. wide; seeds obliquely round-reniform, dark-brown, 



2 mm. long. 



Type locality: Cheyenne, Wyoming. 



Distribution: Western Nebraska, Wyoming, Utah, and Colorado.. 



Illustration: M. E. Jones, Rev. Astrag. pi. 7,f. 27. 



86. Phaca leptalea (A. Gray) Rydb. Bull. Torrey Club 

 40; 48. 1913. 



IPhaca panciflora Nutt.; T. & G. Fl. N. Am. 1: 348. 1838. 



Astragalus pauciflorus A. Grav, Proc. Acad. Phila. II. 7: 60. 1863. Not .4. pauciflorus Pall. 1800; 



nor A. pauciflorus Hook. 1831. 

 Astragalus leptaleus A. Gray, Proc. Am. Acad. 6: 220. 1864. 

 Tragacantha leptalea Kuntze, Rev. Gen. 946. 1891. 



Perennial, with a slender cespitose root stock; stems slender, decumbent or spreading, 

 1-2 dm. long, sparingly strigose; leaves 4-7 cm. long; lower stipules connate, deltoid, 3 mm. 

 long, the upper lance-subulate; leaflets 15-25, lance-linear to oblong, often acute, 5-12 mm. long; 

 peduncles 2-5 cm. long, slender; racemes 2-5-flowered; calyx more or less black-hairy, the tube 



3 mm. long; the lobes subulate, 2 mm. long; corolla white; banner obovate, emarginate, nearly 

 1 cm. long; wings 8 mm. long, the blade oblong, with an acute basal auricle; keel-petals 6 mm. 

 long, the blade broadly lunate, rounded at the apex, purple-tipped; pod sessile, strigose with 

 black hairs, ellipsoid, 1 cm. long, 5 mm. wide; seeds obliquely round-reniform, 2 mm. long. 



Type locality: Valleys of the Rocky Mountains, in South Park, Colorado. 

 Distribution: Mountains of Colorado. 

 Illustration: M. E. Jones, Rev. Astrag. pi. <?. f. 30. 



87. Phaca stragala (Fernald) Rydberg. 



Astragalus stragalus Fernald, Rhodora 28: 214. 1926. 



Perennial; stems many, slender, creeping, forming mats 3-4 dm. in diameter, glabrous or 

 sparsely strigose; stipules lance-oblong, 2-4 mm. long; leaves spreading, 2-6 cm. long, strigose; 

 leaflets 9-19, oval or elliptic, retuse, 2-10 mm. long, 1-5 mm. wide, glabrous on both sides or 

 strigose beneath; peduncles 1-5 cm. long; racemes short, 1-10-flowered; bracts scarious, lanceo- 

 late; calyx blaek-strigose, the tube 2.5-3 mm. long, the teeth lanceolate, 1-1.5 mm. long; 

 corolla purple, 8-12 mm. long; banner rounded-obovate, retuse; wings much shorter, the blade 

 narrowly obovate, with an oblong basal auricle; keel-petals as long, the blade lunate, equaling 

 the claw; pod oblong-ellipsoid, 6-8 mm. long, 2.5-4 mm. wide, black-hairy; seeds 5-8, olive- 

 brown, about 1.5 mm. long. 



Type locality: Cook Point, Pistolet Bay, Newfoundland. 

 Distribution: Known only from the type locality. 



88. Phaca Yukonis (M. E. Jones) Rydberg. 



Astragalus Yukonis M. E. Jones, Rev. Astrag. 89. 1923. 



Perennial, with a slender, cespitose rootstock; stems filiform, decumbent at the base, 

 1-2 dm. high, sparingly pubescent; leaves 2-5 cm. long; stipules deltoid, 1-3 mm. long; leaflets 

 5-13, elliptic, 4-7 mm. long, obtuse or retuse at the apex, glabrous above, sparingly strigose 

 beneath; peduncles about 1 dm. long; racemes at first short, elongate in age, 2-6 cm. long; 

 bracts deltoid, scarious, 2 mm. long; pedicels 1-1.5 mm. long; calyx black-hairy, the tube 2.5 

 mm. long, the teeth deltoid-subulate, fully 1 mm. long; corolla purple, 7-8 mm. long; banner 

 obovate, moderately arched; wings shorter, the blades oblong, rather strongly falcate; keel- 

 petals still shorter, the blade strongly lunate, rounded at the apex; pod ellipsoid, about 7 mm. 

 long, 4 mm. broad, black-hairy with short hairs. 



Type locality: Ranch Valley, Fort Selkirk on the Yukon. 



Distribution: Yukon. 



Illustration: M. E. Jones, Rev. Astrag. pi. 7,f. 28. 



