264 NORTH AMERICAN FLORA (Volume 24 



16. Homalobus Woodruff! (M. E. Jones) Rydberg. 



Astragalus Woodruffi M. E. Jones, Rev. Astrag. 77. 1923. 



A perennial, with a woody rootstock; stems 3-5 dm. high, branched below, erect, strigose- 

 canescent, terete ; leaves 4-7 cm. long, ascending ; stipules large, rigid, green, ovate or lanceolate ; 

 leaflets 1—5, filiform or narrowly linear, 1-3 cm. long, strigose-canescent, not articulate to the 

 rachis, channeled; peduncles 1-2 dm. long, strict; racemes elongate, 1.5-2 dm. long; bract lance- 

 subulate, green, rigid, 3-5 mm. long; pedicels 2-3 mm. long; calyx campanulate, silky-strigose, 

 the tube 5 mm. long, 3 mm. broad, the teeth subulate, 5 mm. long; corolla purple, with white 

 claws, about 15 mm. long; banner narrowly obovate, slightly arcuate; wings shorter, the blade 

 oblong, falcate, obtuse, with a long reflexed auricle; keel-petals 12 mm. long, the blade lunate, 

 rounded at the apex, as long as the claw, with a large basal auricle; pod linear, about 2 cm. 

 long and 4 mm. broad, grayish-strigose, more or less arcuate. 



Type locality: San Rafael Swell, Utah. 

 Distribution: Known only from the type locality. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 4, f. 13. 



17. Homalobus Clementis Rydb. Bull. Torrey Club 31: 563. 1904. 



Astragalus tenellus Clementis F. Macbr. Contr. Gray Herb. 65: 35. 1922. 



A perennial, with a cespitose caudex or rootstock; stems ascending or erect, 2-3 dm. high, 



sparingly strigose or glabrate; stipules broadly triangular, acuminate, connate, about 3 mm. 



long; leaves 5-8 cm. long; leaflets 11-21, oblong or lanceolate, acute, 7-12 mm. long, glabrous 



above, sparingly strigose beneath; racemes 8-12-flowered, including the petiole 7-10 cm. long; 



bracts lanceolate, 2 mm. long; calyx strigose with black hairs, the tube 2.5-3 mm. long, the 



teeth about 1.5 mm. long; corolla purplish; banner 7-8 mm. long, obovate; wings 6-7 mm. long, 



the blade obliquely oblanceolate; wing-petals 5—6 mm. long, with a rounded tip; pod oblong, 



sessile, about 1 cm. long and 4 mm. wide, black-hairy, the upper suture almost straight; seeds 



black, obliquely reniform, 2.5 mm. long, nearly 2 mm. broad. 



Type locality: Sangre de Cristo, Colorado. 

 Distribution: Colorado. 



18. Homalobus wingatanus (S. Wats.) A. Heller, Muhlenbergia 

 1: 145. 1906. 



Astragalus wingatanus S. Wats. Proc. Am. Acad. 18: 192. 1883. 

 Astragalus wingalensis M. E. Jones, Proc. Calif. Acad. II. 5: 636. 1895. 

 Homalobus wingalensis Rydb. Bull. Torrey Club 31: 563. 1904. 



A perennial, with a cespitose caudex; stems 1.5-3 dm. high, strigose; stipules scarious, 

 deltoid, acuminate, connate, 5 mm. long; leaves 3-6 dm. long; leaflets 9-13, linear-oblong or 

 oblanceolate, 6-15 mm. long, 2-3 mm. wide, grayish-green, glabrous above, strigose beneath; 

 racemes rather lax, 10-16-flowered, including the peduncle 10-15 cm. long; calyx strigose with 

 mixed black and white hairs, the tube scarcely 2 mm. long, the teeth subulate, 1 mm. long; 

 corolla white, tinged with purple, and the keel tipped with purple; banner 6 mm. long, obovate; 

 wings and keel-petals about 5 mm. long, the latter with a rounded tip; pod oblong, acute at 

 each end, sessile, glabrous, 10-22 mm. long, 4 mm. wide; seeds obliquely reniform, 3 mm. long, 

 2 mm. broad. 



Type locality: Fort Wingate. New Mexico. 



Distribution: New Mexico, Southern Colorado, and southeastern Utah. 



Illustration: M. E. Jones, Rev. Astrag. pi. 1, f. 1. 



19. Homalobus amphidoxus (Blankinship) Rydberg. 



?Aslragalus miser A. Gray, Proc. Am. Acad. 6: 228. 1864. Not A . miser Dougl. 1831. 

 Astragalus amphidoxus Blankinship, Mont. Agr. Coll. Stud. 1: 72. 1905. 

 Homalobus miser Rydb. Bull Torrey Club 40: 52, in part. 1913. 



A cespitose perennial, with a thick woody root; stems numerous, 1-1.5 dm. high, sparsely 

 strigose; leaves ascending, 5-8 cm. long; stipules strigose, deltoid, 3-4 mm. long; leaflets 13-17, 

 lanceolate to lance-linear, acute, glabrous above, strigulose beneath, 1-1.5 cm. long, 2-4 mm. 



