414 NORTH AMERICAN FLORA [Volume 24 



27. Cystium sesquimetrale Rydberg, sp. nov. 



A perennial; stems procumbent, spreading, making mats 1.5 m. in diameter, glabrous or 

 nearly so, the internodes much longer than the leaves; leaves spreading, 4-5 cm. long, the 

 petioles very short; stipules deltoid, reflexed, 4—5 mm. long, green; leaflets 9-13, oblong-ob- 

 lanceolate, 1-2 cm. long, 4—8 mm. wide, glabrous above, strigose beneath; peduncles 3-4 cm. 

 long; racemes 2-3 cm. long, dense; bracts lanceolate, 2 mm. long; calyx strigose, the tube 4 

 mm. long, the teeth subulate, 2 mm. long; corolla purple; banner obovate, only slightly recurved, 

 12-14 mm. long; w ; ngs 11-12 mm. long, the blade oblong; keel-petals about 1 cm. long, the 

 blade strongly lunate, rounded at the apex; pod leathery, mottled, strigose, ovoid, 2-2.5 cm. 

 long, fully 1 cm. thick, slightly arcuate, sulcate on both sutures. 



Type collected at Soda Springs, Nevada, June 11, 1882, Shockley 278 (Gray Herbarium). 



Distribution: Known only from the type locality. 



28. Cystium idriense (M. E. Jones) Rydberg, sp. nov. 



Astragalus lentiginosus idriensis M. E. Jones, Contr. W. Bot. 10: 63. 1902. 



Perennial, with a cespitose woody caudex; stems several, decumbent below, about 2 dm. 

 long, striate, sparingly strigose; leaves 2-4 cm. long, spreading; stipules lanceolate, 2-3 mm. 

 long, scarious; leaflets 13-19, obovate, 5-8 mm. long, obtuse or truncate at the apex, strigose 

 beneath, glabrate above; peduncles 3-5 cm. long, erect; racemes short, dense, about 2 cm. 

 long; bracts ovate, 2 mm. long; calyx sparingly strigose, the tube 4 mm. long, the teeth subu- 

 late, 1 mm. long; corolla purple, 10-12 mm. long; banner obovate, with a whitish spot, striate 

 with purple; wings shorter, the blade oblong; keel-petals still shorter, the blade broadly lunate, 

 rounded at the apex; pod lance-ovoid in outline, strongly incurved, acute on the upper suture, 

 15-20 mm. long, 4-5 mm. wide, 7 mm. thick, mottled, strigose. 



Type locality: [Not given in the original but supplied later] New Idria, San Benito County, 

 California. 



Distribution: Known only from the type locality. 



Illustration: M. E. Jones. Rev. Astrag. pi. 24. 



29. Cystium tehatchapiense Rydberg, sp. nov. 



A cespitose perennial; stems ascending, 2-4 dm. high, glabrate or sparingly strigose, often 

 tinged with red; leaves ascending, 5-9 cm. long; stipules deltoid, 4 mm, long, ciliate; leaflets 

 obovate or obcordate, 1-1.5 cm. long, 5-10 mm. wide, glabrous, or ciliate on the margins; 

 peduncles 3-5 cm. long; racemes dense, 2-3 cm. long; bracts ovate, 3 mm. long, black-hairy; 

 calyx black-hairy, the tube 5 mm. long, the teeth deltoid, scarcely 1 mm. long; corolla purple; 

 banner 15 mm. long, obovate; wings 12 mm. long, the blade oblong, with a large basal auricle; 

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

 pod leathery, ovoid, arcuate, mottled, strigose, 2-2.5 cm. long, fully 1 cm. wide. 



Type collected at Tehatchapi, Kern County, California, May 5, 1905, Heller 7833 (herb. N. Y. 

 Bot. Card.). 



Distribution: Type locality and vicinity. 



30. Cystium diphysum (A. Gray) Rydb. Bull. Torrey Club 

 32:659. 1906. 



Astragalus diphysus A. Gray, Mem. Am. Acad. II. 4: 34. 1849. 



Astragalus diphysus albifiorus A. Gray, Mem. Am. Acad. II. 4: 34, in part. 1849. 



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



Astragalus lentiginosus diphysus M. E. Jones, Proc. Calif. Acad. II. 5: 673. 1895. 



A cespitose perennial; stem 2-4 dm. high, striate, glabrous; leaves ascending, 5-10 cm. 

 long; stipules deltoid, 4-5 mm. long; leaflets elliptic or obovate, rounded or retuse at the 

 apex, glabrous or nearly so, 1-1.5 cm. long; peduncles 3-5 cm. long; racemes dense, 2-4 cm. 

 long; bracts ovate, 1-2 mm. long, ciliate; calyx strigose, the tube 5 mm. long, the teeth 2 mm. 

 long, subulate; corolla purple, rarely white, about 15 mm. long; petals as in the preceding; pod 

 rather firm, obliquely ovoid, acuminate, somewhat arcuate, 2-2.5 cm. long, about 1 2 mm. thick, 

 glabrous. 



Type locality: Plains around Santa Fe, New Mexico. 



Distribution: New Mexico, Arizona, and Utah. 



Illustrations: M. E. Jones, Rev. Astrag. pi. 24, pi. 25. 



