426 NORTH AMERICAN FLORA [Volume 24 



kinked hairs on both sides; peduncles 5-7 cm. long, slender, erect; racemes 3-6 cm. long; 

 bracts lanceolate, 2 mm. long; calyx canescent with kinked hairs, the tube 3 mm. long, the 

 teeth subulate, nearly 2 mm. long; corolla purplish or white, 8-10 mm. long; banner obovate, 

 abruptly arched; wings shorter than the banner, the blade oblanceolate, falcate; keel-petals 

 slightly shorter, strongly arcuate at the obtuse apex; pod ascending, arcuate, 1.5 cm. long, 

 3 mm. wide and thick, sulcatc on the lower suture, deeply cordate in cross-section. 



Type locality: Parras, Coahuila. 



Distribution: Coahuila. 



Illustration: M. E. Jones, Rev. Astrag. pi. 65, f. 217. 



23. Hamosa madrensis (M. E. Jones) Rydberg. 



Astragalus madrensis M. E. Jones, Rev. Astrag. 274. 1923. 



A perennial, with a taproot and woody cespitose caudex; stems decumbent at the base, 

 3-5 dm. high, striate, sparingly strigose; leaves 6-10 cm. long, ascending; stipules lanceolate, 

 3 mm. long; leaflets 15-21, oblong, 5-15 mm. long, cuneate at the base, usually retuse at the 

 apex, sparingly strigose beneath, glabrous above; peduncles about 5 cm. long; racemes 4-6 

 cm. long, few-flowered; bracts lanceolate, 3 mm. long; calyx canescent, silky-strigose, the tube 

 5 mm. long, the teeth subulate, 2 mm. long; corolla about 1 cm. long, pale; banner obovate, 

 striped with purple, strongly arched at the middle; wings about as long, the blade obliquely 

 obovate, nearly straight; keel-petals much shorter, the blade lunate, obtuse; pod linear, 

 slightly falcate, 1-1.5 cm. long, 2 mm. wide and 1.5 mm. thick, strongly reflexed, sulcate on 

 the lower suture. 



Type locality: Sierra Madre, Chihuahua. 

 Distribution: Chihuahua and western Texas. 

 Illustration: M. E. Jones, Rev.' Astrag. pi. 69. 



5. Leptocarpae. Weak annuals; stems usually branched below; racemes few-flowered; 

 flowers small or middle-sized; calyx-tube short, campanulate, often not longer than the teeth; 

 keel-petals of the corolla acute or obtuse but not beaked; pod strongly flattened, linear, nar- 

 rowly cordate in cross-section. 



24. Hamosa Bruceae (M. E. Jones) Rydb. Bull. Torrey Club 

 54: 323. 1927. 



Astragalus lener Bruceae M. E. Jones, Rev. Astrag. 268. 1923. 



A slender annual; stems less than 1 dm. high, sparingly strigose or glabrate, branched at 

 the base, often reddish or purplish; leaves 3-5 cm. long, ascending; stipules broadly ovate, 

 2-3 mm. long; leaflets 6-9, mostly cuneate-obovate, deeply notched, 5-10 mm. long, strigose 

 beneath, glabrate above; peduncles 3-5 cm. long, very slender; racemes short, 2-4-flowered ; 

 bracts lanceolate, 1 mm. long; calyx black-hairy, the tube about 2 mm. long, the teeth subulate, 

 1 mm. long; corolla bluish-purple, 8 mm. long; pod falcate, lunate, 1.5-2 cm. long, 4 mm. 

 wide and 3 mm. thick, glabrous, reticulate, purplish-mottled, sulcate on the lower suture, 

 cordate in cross-section. 



Type locality: Butte County, California. 

 Distribution: Butte County, California. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 68. 



25. Hamosa Kelloggiana Rydb. Bull. Torrey Club 54: 323. 1927. 



Astragalus hypogloltis slrigosus Kellogg, Proc. Calif. Acad. 2: 115. 1861. 



A slender annual; stem glabrous or sparingly strigose, 1-2 dm. high, branched at the base; 

 leaves 5-6 cm. long, ascending; stipules lance-deltoid, about 3 mm. long; leaflets 5-13, those of 

 the lower leaves oblong or cuneate, 1 cm. long or less, those of the other leaves linear, 1-2 cm. 

 long, acute or obtuse, 1-2 mm. wide, strigose beneath; peduncles 4-6 cm. long; racemes very 

 short, 4-7-flowered; bracts lanceolate, 1 mm. long; calyx black-hairy, the tube 2 mm. long, 

 the teeth lance-subulate, 1.5 mm. long; corolla bluish-purple, striate, 8 mm. long, similar to 



