412 NORTH AMERICAN FLORA [Volume 24 



obtuse; keel-petals similar but broader; pod glabrous, obliquely ovoid, 15-18 mm. long, 10 mm. 

 thick, slightly arcuate. 



Type collected at Candelaria, Nevada, May 1882, Shockley 220; also 27 1 (both in Gray Herba- 

 rium). 



20. Cystium cornutum Rydberg, sp. now 



Astragalus araneosus Sheldon, Minn. Bot. Stud. 1: 170, in part. 1894. 



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

 long; stipules deltoid, 3-5 mm. long, glabrous; leaflets 13-17, broadly obovate, 10-18 mm 

 long, rounded to retuse at the apex, glabrous, or rarely with a few hairs on the margins and 

 midribs; peduncles 3-5 cm. long; racemes dense; bracts lanceolate or ovate, 2-3 mm. long, 

 with a few black hairs; pedicels 1 mm. long; calyx strigose with mixed white and black hairs, 

 the tube about 4 mm. long, the teeth subulate, 2 mm. long; corolla about 15 mm. long, white 

 or ochroleucous, the keel tipped with purple; banner obovate; wings slightly shorter, the blade 

 oblong, with a large auricle; keel-petals still shorter, broader, somewhat lunate, with a broad 

 auricle and rounded tip; pod fully 2.5 cm. long, 12-14 mm. thick, decidedly arcuate, leathery, 

 sparingly strigulose, long-acuminate. 



Tvpe collected at Muddy Station, John Dav Vallev, Mav 13, 1885, T. Howell (herb. Columbia 

 Univ.). 



Distribution: Oregon and northern California. 



21. Cystium lentiginosum (Dougl.) Rydb. Bull Torrey Club 

 40:50. 1913. 



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



Tragacanlha lenliginosa Kuntze, Rev. Gen. 946. 1891. 



Cystium salinum Rydb. Fl. Rocky Mts. 492. 1917. Not Astragalus salinus Howell. 1893. 



Astragalus lenliginosus scorpionis M. E. Jones, Rev. Astrag., in part, 124. 1923. 



Astragalus lenliginosus carinatus M. E. Jones, Rev. Astrag. 125. 1923. 



A cespitose perennial; stem decumbent or ascending, 1-3 dm. high, slender, glabrous or 

 sparingly strigose; leaves ascending, 4-7 cm. long; stipules lanceolate, 2-3 mm. long; leaflets 

 13-17, obovate or oval, 6-10 mm. long, glabrous or with scattered hairs on the margins and 

 midribs, obtuse at the apex; peduncles 2-4 cm. long; racemes dense, 1-2 cm. long; bracts 

 lanceolate, 1-2 mm. long; calyx strigose, sometimes more or less black-hairy, the tube 2.5-3 

 mm. long, the teeth subulate, 1-2 mm. long; corolla white, 8-10 mm. long; banner oblanceolate, 

 moderately arched ; wings shorter, obliquely oblong-oblanceolate, with a rather long auricle ; 

 keel-petals shorter, lunate; pod thin, about 1.5 cm. long, 6-9 mm. thick, strongly arcuate- 

 inflexed, strigulose. 



Type locality: Blue Mountains, Oregon. 



Distribution: Oregon and Idaho. 



Illustration: M. E. Jones, Rev. Astrag. pi. 23, f. 80. 



22. Cystium ormsbyense Rydberg, sp. nov. 



A perennial; stems diffuse and much branched, 3-5 dm. long or more, terete, straw- 

 colored, glabrous or with a few scattered hairs; leaves ascending, 5-6 cm. long; stipules lance- 

 deltoid, 2-3 mm. long; leaflets 15-19, elliptic, rounded at the apex, acute at the base, S-12 

 mm. long, glabrous above, sparingly strigose beneath; peduncles 1-3 cm. long; racemes dense, 

 1-2 cm. long; bracts lanceolate, 2 mm. long; calyx white-strigose, the tube 3 mm. long, the 

 teeth subulate, 1 mm. long; corolla white, 8-9 mm. long; pod ovoid, acuminate, 12-15 mm. 

 long, 8-9 mm. thick, strigulose, papery, unmottled, scarcely incurved at the tip. 



Type collected in Eagle Valley, Ormsby County, Nevada, 1902, Baker 1275 (herb. N. Y. Bot. 

 Card.). 



Distribution: Western Nevada. 



23. Cystium Sierrae (M. E. Jones) Rydberg, sp. nov. 



Astragalus lenliginosus Sierrae M. E. Jones, Rev. Astrag. 124. 1923. 



A perennial, from a woody taproot and caudex; stems several, decumbent, 2-3 dm. 

 long, sparingly strigose; leaves numerous, ascending; stipules lanceolate, 2-3 mm. long, stri- 



