410 NORTH AMERICAN FLORA [Volume 24 



ceding; pod mottled, sparingly short-pubescent, papery, rounded-ovoid, about 2 cm. long, 

 nearly 1.5 cm. thick, somewhat sulcate on both sutures, short-acuminate, the tip upturned. 



Type collected in southeastern Utah in 1870, E, Palmer (Torrey Herbarium). 



13. Cystium Merrillii Rydberg, sp. nov. 



A perennial, with a cespitose rootstock; stems 2-3 dm. long, striate or sulcate, glabrous, 

 stout; leaves ascending, 4—7 cm. long; stipules deltoid, 3-5 mm. long, the lower scarious and 

 broad, the upper greener and narrower; leaflets 11-15, broadly obovate, rounded or retuse 

 at the apex, 10-15 mm. long, 5-8 mm. wide, glabrous or nearly so and somewhat glaucous; 

 peduncles 2-3 dm. long; racemes 5-10-flowered, 2-4 cm. long; bracts lanceolate, 3-4 mm. long, 

 yellowish; calyx glabrous or with a few black hairs, the tube 7-8 mm. long, the teeth lance- 

 subulate, 3-4 mm. long; corolla white, fully 1.5 mm. long; banner broadly obovate; wings 

 somewhat shorter, with slender claws, the blade obliquely oblanceolate, with a large basal 

 auricle; keel-petals similar and about as long, but broader, rounded at the apex; pod glabrous, 

 leathery, obliquely ovoid, about 3 cm. long, 2 cm. thick, short-acuminate, the tip flattened 

 laterally and upturned. 



Type collected on Leucite Hills, Wyoming, June 18, 1901, Merrill &f Wilcox 6S0 (herb. N. Y. 

 Bot. Gard.). 



Distribution: Wyoming. 



14. Cystium platyphyllidium Rydberg, sp. nov. 



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



Astragalus lenliginosus cuspidocarpus M. E. Jones, Proc. Calif. Acad. II. 5: 673. 1895. Not 

 A. cuspidocarpus Sheldon, 1894. 



A perennial, with a cespitose caudex; stems decumbent at the base, 3-4 dm. high, sulcate, 

 glabrous; leaves ascending, 5—10 cm. long; stipules deltoid, 4—5 mm. long; leaflets obovate, 

 1-2 cm. long, 8-12 mm. wide, glabrous, cuneate at the base, rounded or retuse at the apex; 

 peduncles 3-4 cm. long; racemes short, subcapitate, 5-10-flowered; bracts lanceolate, 2-3 mm. 

 long; calyx sparingly black-hairy, the tube 4 mm. long, the teeth subulate, 2 mm. long; corolla 

 white, about 1 cm. long; pod glabrous, leathery, obliquely lance-ovoid, strongly arcuate, slightly 

 sulcate on the sutures; seeds obliquely reniform, 3 mm. long, 2.5 mm. thick. 



Tvpe collected on Pine Creek, Gilliam County, Oregon, June 7, 1891, J. B. Leiberg 171 (herb. 

 N. Y. Bot. Gard.). 



Distribution: Idaho, Washington, Oregon, and northern Nevada and California. 



15. Cystium araneosum (Sheldon) Rydb. Bull. Torrey Club 

 40:50. 1913. 



Astragalus araneosus Sheldon, Minn. Bot. Stud. I: 171. 1894. 



A perennial, with a cespitose caudex; stems several, erect or decumbent at the base, 

 sparingly strigose, 1.5-4 dm. high, striate, often tinged with red; leaves 5-7 cm. long, the 

 rachis strigose; stipules deltoid, acuminate, 3-5 mm. long, often reflexed; leaflets 13-19, oval 

 or elliptic, obtuse to emarginate at the apex, glabrate above, strigose beneath, 7-10 mm. long; 

 peduncles 5-8 cm. long, striate and strigose; racemes dense, subcapitate, 1 0- 1 2-flowered ; 

 calyx sparingly strigose with white and black hairs, the tube 4 mm. long, the teeth subulate, 

 2 mm. long; corolla 12-15 mm. long, white, tipped with purple; banner obovate, slightly 

 arched; wings shorter, the blade obliquely oblong, with a large basal auricle; keel-petals 

 broader and shorter, the blade falcate, obtuse; pod 2-2.5 cm. long, 1 cm. thick, strongly 

 incurved at the middle; seeds obliquely suborbicular-reniform. 



Type locality: Frisco, Utah. 

 Distribution: Western Utah. 



