282 NORTH AMERICAN FLORA [Volume 24 



4. Diholcos scobinatulus (Sheldon) Rydb. Bull. Torrey Club 



40:51. 1913. 



Astragalus Haydenianus major M. E. Jones, Zoe 2: 241. 1891. 

 Astragalus scobinatulus Sheldon. Minn. Bot. Stud. 1: 24. 1894. 

 Astragalus Haydenianus Nelsonii Gand. Bull. Soc. Bot. Fr. 48: xv. 1902. 



A perennial, with a woody root; stems several from the short eaudex, erect or decumbent 

 at the base, strigose; leaves 5-8 cm. long, ascending; stipules deltoid, 3-4 mm. long; leaflets 

 15-19, elliptic or oblong, firm, glabrous above, strigose beneath, 7-15 mm. long, 3-5 mm. wide; 

 peduncles 5-10 cm. long; racemes many-flowered, 5-10 cm. long; bracts lance-subulate, acu- 

 minate, 3-4 mm. long; pedicels 2-3 mm. long; calyx strigose with white or black hairs, the tube 

 3 mm. long, the teeth subulate, 1.5-2 mm. long; corolla white, 10-12 mm. long; banner 

 obovate, rather strongly arched at the middle, retuse; wings nearly as long, the blade obliquely 

 oblanceolate, with a long recurved auricle; keel-petals as long, similar but broader, more falcate, 

 and rounded at the apex; pod strigose, cross-rugose when mature, the stipe 5 mm. long, the 

 body oblong, acute at each end, about 1 cm. long, 2 mm. wide, 3.5 mm. thick; seeds dark- 

 brown, 3 mm. long. 



Type locality: Johnson, southern Utah. 

 Distribution: Wyoming. Utah, and New Mexico. 



5. Diholcos Haydenianus (A. Gray) Rydb. Bull. Torrey Club 



32:664. 1906. 



Astragalus Haydenianus A. Gray, in Brand. Fl. S. W. Colo. 235. 1876. 

 Tragacanlha Haydeniana Kuntze, Rev. Gen. 945. 1891. 

 Astragalus bisulcatus Haydenianus M. E. Jones, Zoe 2: 240. 1891. 

 Astragalus grallator S. Wats. Zoe 3: 52. 1892. (Abnormal form.) 

 Homalobus grallator Rydb. Bull. Torrey Club 32: 666. 1905. 



A perennial, with a woody root; stems several, erect or ascending, 3-5 dm. high, strigose 

 and striate; leaves 5-8 cm. long, ascending; stipules deltoid, 4—5 mm. long, membranous; 

 leaflets 15-23, oblong, 1-2 cm. long, 3-5 mm. wide, thick, glabrous above, strigose beneath, 

 usually pale, rounded or retuse at the apex; peduncles 5-8 cm. long; racemes many-flowered, 

 5-10 cm. long; bracts lance-subulate, 4-5 mm. long; pedicels 3 mm. long, recurved; calyx 

 strigose, often with black hairs, the tube 3 mm. long, the teeth subulate, 1-1.5 mm. long; corolla 

 white, about 8 mm. long, similar to that of D. scobinatulus; pod strigose, cross-rugose when 

 mature, the stipe 3 mm. long, the body ellipsoid, 8-9 mm. long. 



Type locality': Grand River, Middle Park, Colorado. 

 Distribution: Colorado and southern Wyoming. 

 Illustrations: M. E. Jones. Rev. Astrag. pi. 62; pi. 63, f. 205. 



6. Diholcos micranthus Rydb. Fl. Rocky Mts. 500. 1917. 



A perennial, with a woody root; stems several, erect or ascending, sparingly strigose, 

 2-4 dm. high; leaves 5-7 cm. long; stipules deltoid, 4 mm. long; leaflets 17-25, linear to lance- 

 oblong, acute at each end, 7-20 mm. long, 2-4 mm. wide, glabrous above, strigose beneath; 

 peduncles 5-7 cm. long; racemes many-flowered, 5-7 cm. long; bracts lance-subulate, 4 mm. 

 long; pedicels 2-3 mm. long, recurved; calyx strigose, the tube 2-2.5 mm. long, the teeth 

 subulate-filiform, 1-1.5 mm. long, the upper shorter; corolla 6-7 mm. long, cream-colored; 

 pod strigose, the stipe 3-4 mm. long, the body about 8 mm. long, acute at each end, scarcely 

 2 mm. wide and 3 mm. thick; seeds obliquely reniform, 3 mm. long, dark-brown. 



Type locality: [La Veta.J Colorado. 

 Distribution: Colorado. 



7. Diholcos oocalycis (M. E. Jones) Rydberg. 



Astragalus oocalycis M. E. Jones, Contr. W. Bot. 8: 10. 1898. 



Cnemidophacos urceolatus Rydb. Fl. Rocky Mts. 502. 1917. 



Astragalus urceolatus Greene; Rydb. Fl. Rocky Mts. 503, as synonym. 1917. 



A perennial; stem 3-6 dm. high, angled and suleate, more or less strigose, often flexuose; 

 leaves about 1 dm. long, ascending or spreading; stipules deltoid, reflexed, 5-7 mm. long; 



