424 NORTH AMERICAN FLORA [Volume 24 



reflexed auricle; keel-petals about 10 mm. long, the blade broadly lunate, obtuse, with a broad 

 auricle; pod densely strigulose, canescent when young, fully 2 cm. long, 2-3 mm. wide and 

 thick, moderately arcuate, acute at each end, cordate in cross-section. 



Type locality: Hite's Cove on the Merced River, Mariposa County, California. 

 Distribution: Mariposa County, California. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 66, f. 224. 



16. Hamosa Gooddingii Rydb. Bull. Torrey Club 54: 20. 1927. 



A perennial, with a cespitose caudex; stems decumbent, about 1 dm. high, strigose; leaves 

 spreading, 2-3 cm. long; stipules ovate, 2-3 mm. long; leaflets 9-13, obovate to elliptic, rounded 

 or obtuse at the apex, 3-5 mm. long, 2-3 mm. wide, glabrous above, strigose beneath; peduncles 

 7-10 cm. long, strigose, arcuate; racemes 2-4 cm. long; bracts 2 mm. long, lanceolate; calyx 

 strigose with mixed black and white hairs, the tube 4 mm. long, the teeth subulate, 2 mm. 

 long; corolla dark, bluish-purple, about 1 cm. long; banner obovate, retuse; wings shorter, the 

 blade oblong-falcate, with a broad basal auricle; keel-petals much shorter, the blade broadly 

 lunate, strongly arched, rounded at the apex; pod lance-linear, 1.5-2 cm. long, 3 mm. wide and 

 thick, somewhat falcate, minutely strigose or in age glabrate, deeply cordate in cross-section, 

 membranous. 



Type locality: Rocky slope in the Huachuca Mountains, Arizona. 

 Distribution: Known only from the type locality. 



17. Hamosa ensiformis (M. E. Jones) Rydb. Bull. Torrey Club 



54:21. 1927. 

 Astragalus ensiformis M. E. Jones, Proc. Calif. Acad. II. 5: 658. 1895. 



A perennial, with a scaly rootstock; stem about 1 dm. high, purplish, sparingly strigose; 

 leaves 5-8 cm. long, ascending; stipules large, broadly ovate, 1 cm. long, scarious, veiny; 

 leaflets 13-17, green, oval or elliptic, rounded at the apex, 1-1.5 cm. long, glabrous above, 

 sparingly strigose-canescent beneath; peduncles 5-8 cm. long, erect; bracts lanceolate, brown- 

 ish-purple, 3 mm. long; pedicels short; calyx pubescent with dark and light hairs intermixed, 

 the tube 5 mm. long, the teeth lanceolate, 1 mm. long; corolla unknown; pod linear-oblong, 

 falcate, 2-2.5 cm. long, 5-6 mm. wide and 3 mm. thick, strigose, elliptic in cross-section, with 

 prominent sutures. 



Type locality: Above Pagumpa, Arizona. 

 Distribution: Known only from the type locality. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 56. 



18. Hamosa drepanoloba (A. Gray) Rydb. Bull. Torrey Club 

 54:21. 1927. 



? Astragalus diaphanus Dougl.; Hook. Fl. Bor. Am. 1:151. 1831. 

 Astragalus dre panolobus A. Gray. Proc. Am. Acad. 19: 75. 1883. 

 ? Astragalus lentiginosus diaphanus M. E. Jones, Proc. Calif. Acad. II. 5: 675. 1895. 



A perennial, with a deep taproot; stems several, sometimes purplish, 1-3 dm. long, more 

 or less hirsutulous-strigose; leaves spreading, 3-6 cm. long; stipules ovate, 3 mm. long, acu- 

 minate; leaflets 9-13, obovate, often retuse at the apex, cuneate at the base, glabrous above, 

 sparingly strigose beneath; peduncles 2-5 cm. long; racemes 2-5 cm. long; bracts lanceolate, 

 1-2 mm. long; calyx more or less black-hairy, the tube 2.5 mm. long, the teeth lance-subulate, 

 1-5 mm. long; corolla light-purple, fading white; banner about 1 cm. long, distinctly purple- 

 veined, narrowly obovate, deeply notched; wings much shorter, the blade oblanceolate, falcate, 

 with a reflexed auricle; keel-petals much shorter, the blade broadly lunate; pod about 2 cm. 

 long, 4—5 mm. wide and 3 mm. thick, thin-walled, sometimes purplish, minutely strigose, 

 strongly arcuate, deeply sulcate on the lower suture, deeply cordate in cross-section. 



Type locality: On John Day River at Scott's Bridge, Oregon. 

 Distribution: Washington, Oregon, and Nevada. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 66. f. 223. 



