108 NORTH AMERICAN FLORA [Volume 24 



5. Cystium macrolobum Rydberg, sp. nov. 



Astragalus diphysus S. Wats. Bot. King's Espl. 65, in part. 1871. 



Probably a winter annual; stem about 3 dm. high, strigose-eanescent; leaves about 1 dm. 

 long in less; stipules deltoid, 3-4 mm. long; leaflets 11-15, obovate or obcordate, about 1 cm. 

 long, 6-S mm. wide, usually retuse, eanescent on both sides with kinky short hairs; peduncles 

 4—6 cm. long, ascending; racemes rather lax, about 5 cm. long; bracts subulate, 2-3 mm. long; 

 calyx pubescent, with mixed white and black hairs, the tube 3-4 mm. long, the teeth subulate, 

 3 mm. long; corolla white, 11-12 mm. long; banner rather narrowly obovate; wings shorter, 

 the blades oblong, with a large basal auricle; keel-petals broader, obliquely obovate, obtuse; 

 pod glabrous, ovoid, about 2.5 cm. long, nearly 1.5 cm. thick, long-acuminate, papery, not 

 mottled. 



Type collected at West Humboldt Mountains, Nevada. June. 1868, Watson 254, in part (Torrey 

 Herbarium). 



Distribution: Nevada. 



6. Cystium nigricalyce (M. E. Jones) Rydberg, sp. nov. 



Astragalus lenliginosus nigricalycis M. E. Jones, Proc. Calif. Acad. 5: 674. 1895. 



A perennial, branched at the base; stems 3-4 dm. high, often flexuose, white-woolly with 

 short hairs; leaves 8—10 dm. long, spreading; stipules deltoid, about 4 mm. long; leaflets 1 1—19, 

 obovate, 7-15 mm. long, 4—8 mm. broad, rounded, truncate, or emarginate at the apex, short - 

 villous on both sides, rather firm; peduncles 6-8 mm. long; racemes 5-7 cm. long, rather dense; 

 bracts lanceolate, 3 mm. long; calyx black-hairy, the tube fully 4 mm. long, the teeth lanceolate, 

 nearly 2 mm. long; corolla white, about 12 mm. long; banner elongate-obovate ; wings shorter, 

 slightly arcuate, the blade oblong, with a large auricle; keel-petals broader, with a rounded 

 apex; pod rather firm, densely short-villous, ovoid, long-acuminate, about 2.5 cm. long, 1 cm. 

 thick, somewhat mottled. 



Type locality: Bakersfield, Kern County, California. 

 Distribution: Santa Barbara and Kern counties, California. 

 Illustrations: M. E. Jones, Rev. Astrag. pi. 23; pi. 24. 



7. Cystium Coulteri (Benth.) Rydb. Bull. Torrey Club 

 40: 50. 1913. 



Astragalus Coulteri Benth. PI. Hartw. 307. 1848. 



Tragacantha Coulteri Kuntze, Rev. Gen. 944. 1891. 



Astragalus lenliginosus Coulteri M. E. Jones, Contr. W. Bot. 8: 4. 1898. 



A biennial or perennial, with a taproot; stem 3-5 dm. high, somewhat flexuose, densely 

 white-silky; leaves 7-15 cm. long, spreading; stipules lance-deltoid, 5 mm. long, silky; leaflets 

 1 1-21, obovate, 1-2 cm. long, 5-10 mm. wide, white-silky on both sides, rounded to retuse at 

 the apex; peduncles 5-10 cm. long, ascending; racemes nearly as long; bracts lanceolate, 3 mm. 

 long; pedicels about 1 mm. long; calyx silky-villous, some of the hairs, especially on the teeth, 

 often blackish, the tube 5 mm. long, the teeth lance-subulate, 3 mm. long; corolla mostly rose- 

 purple, about 15 mm. long; banner obovate, only slightly upturned; wings shorter, almost 

 straight, the blade obtuse, oblong-obovate, with a large basal auricle; keel-petals slightly 

 shorter, broader, rounded at the apex; pod obliquely ovoid, about 2 cm. long and 1 cm. 

 or more wide, rather firm, mottled, densely white-silky, somewhat sulcate on both sutures; 

 seeds dark-brown, obliquely reniform, 3 mm. long, fully 2 mm. thick. 



Type locality: Near Monterey, California. 

 Distribution: Southern California. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 25. 



8. Cystium agninum (Jepson) Rydberg. 



Astragalus lentigiriosus borreganus Jones, Rev. Astrag. 126. 1923. 

 Astragalus agninus Jepson, Man. Fl. PI. Calif. 577. 1925. 



An annual or perhaps perennial; stems several, 2-5 dm. high, flexuose, densely white- 

 silky, leaves 5-7 cm. long, spreading; stipules deltoid, 5 mm. long, silky; leaflets 7-17, obovate 



