Part 7, 1929) FABACEAE: GALEGEAE 409 



or oval, obtuse or rctuse, white-silky on both sides, 6-10 mm. long; peduncles 4-7 em. long, 

 ascending; racemes lax, 4-8 cm. long; bracts lanceolate, 2-3 mm. long; pedicels very short; 

 calyx silky-strigose, the tube about 5 mm. long, the teeth lance-subulate, 2 mm. long; corolla 

 purple, 10-12 mm. long; banner obovate, slightly arched; wings shorter, almost straight, the 

 blade oblong-obovate, with a large auricle; keel-petals slightly shorter, broader, rounded at 

 the apex; pod 15-18 mm. long, lanceolate in outline, slightly inflated, strongly falcate, thicker 

 than wide, gradually acute; seeds brown, obliquely reniform, 2.5 mm. long. 



Type locality: Borrego Springs, Colorado Desert, California. 

 Distribution: Type locality and vicinity. 



9. Cystium Arthu-Schottii (A. Gray) Rydberg. 



Astragalus Arthu-Scholtii A. Gray, Proc Am. Acad. 6: 209. 1864. 



A biennial or perennial; stem 2-4 dm. high, white-silky; leaves 6-10 dm. long; stipules 

 deltoid, 3-4 mm. long; leaflets 11-17, elliptic to obovate, 8-15 mm. long, 4-8 mm. wide, silky 

 on both sides, more densely so on the lower surface, obtuse to retuse at the apex; peduncles 

 3-7 cm. long; racemes of about the same length; calyx silky, the tube 3 mm. long, the teeth 

 subulate, about 1.5 mm. long; corolla 10-12 mm. long, purple, the petals like those of the 

 preceding species but narrower; pod obliquely ovoid, nearly 2 cm. long and 1 cm. thick, rather 

 thin, slightly incurved, mottled, rather sparingly short-hairy. 



Type locality': Diluvial banks of the Colorado, near its mouth. [Probably in Sonora.) 

 Distribution: Southern California to western Arizona and Sonora. 



10. Cystium eremicum (Sheldon) Rydberg. 



Astragalus eremicus Sheldon, Contr. U. S. Nat. Herb. 4: 86. 1893. 



An annual or perhaps perennial; stem often branched at the base, 1-3 dm. high, flexuose, 

 white-silky; leaves 5-8 cm. long, spreading; stipules deltoid, 3 mm. long; leaflets 15-21, elliptic 

 or obovate, rounded or obtuse at the apex, 5-10 mm. long, white-silky with loose hairs; 

 peduncles 4-6 cm. long, ascending; racemes 3-6 cm. long; bracts lanceolate, 1-2 mm. long; 

 calyx silky-villous, the tube 3 mm. long, the teeth subulate, 1 mm. long; corolla purple, about 

 1 cm. long; petals as in C. Coulteri; pod 1.5-2 cm. long, oblique-ovoid, somewhat falcate, 

 mottled, rather thin, sparingly short-hairy. 



Type locality: Lone Pine, Inyo County, California. 

 Distribution: Southern California. 



1 1 . Cystium vulpinum Rydberg, sp. now 



Apparently a perennial; stems 3-5 dm. high, more or less pubescent with white hairs; 

 leaves 7-10 cm. long, ascending; stipules deltoid, reflexed, 3 mm. long; leaflets 13-19, obovate, 

 usually retuse, 6-15 mm. long, silky-villous with white hairs; peduncles 4—5 cm. long; racemes 

 5-6 cm. long; bracts lance-subulate, 2 mm. long; calyx silky-villous with white hairs, the tube 

 4 mm. long, the teeth 2 mm. long, subulate; corolla white, 10-12 mm. long; banner narrowly 

 obovate, retuse; wings shorter than the banner, the blade oblong, nearly straight, with a 

 large basal auricle; keel-petals still shorter, the blade broadly lunate, rounded at the apex; 

 pod papery, sparingly pilose, ovoid, acuminate, fully 2 cm. long, 1 cm. thick, the tip slightly 

 upcurved. 



Type collected in Grass Valley. Nevada, June 1868, Watson 254, in part (Torrey Herbarium). 

 Distribution: Nevada and southern California. 



12. Cystium stramineum Rydberg, sp. now 



An annual; stem 5 dm. high or more, densely silvery-silky, flexuose; leaves about 7 cm. 

 long, ascending; stipules deltoid, 4 mm. long; leaflets 9-13, obovate, rounded or slightly retuse 

 at the apex, 1-2 cm. long, 6-10 mm. wide, white-silky beneath, glabrous above; peduncles 5-7 

 cm. long; racemes 5-10 cm. long; bracts subulate, 2 mm. long; calyx silky, the tube 4 mm. long, 

 the teeth subulate, 2 mm. long; corolla white, about 12 mm. long, similar to that of the pre- 



