Part 6, 1929] FABACEAE: GALEGEAE 359 



82. Phaca jejuna (S. Wats.) Rydb. Bull. Torrey Club 40: 48. 1913. 



Astragalus jejunus S. Wats. Bot. King's Expl. 73. 1871. 

 Tragacantha jejuna Kuntze, Rev. Gen. 945. 1891. 



Perennial, with a thick root and cespitose caudex; stems numerous, 3-5 cm. high, below 

 covered with imbricate, membranous, connate, ciliate stipules; leaves about 2 cm. long; 

 leaflets 7-15, linear, 2-5 mm. long; peduncles shorter than the leaves; racemes 1-3-flowered; 

 calyx strigose, the tube nearly 2 mm. long, the lobes subulate, 1 mm. long; corolla ochroleucous, 

 tinged with violet, 4 mm. long; banner obovate, retuse; wings slightly shorter, the blade obo- 

 vate, with an acute basal auricle; keel-petals much shorter and broader, obtuse; pod sessile, 

 slightly puberulent or glabrate, about 1 cm. long, sub-globose, usually somewhat mottled. 



Type locality: Bear River Valley, near Evanston. Utah [now Wyoming|. 



Distribution: Western Wyoming and northern Utah. 



Illustrations: Bot. King's Expl. pi. 13. f. 1-6; M. E. Jones, Rev. Astrag. pi. 17, f. 65. 



83. Phaca humillima (A. Gray) Rydb. Bull. Torrey Club 

 32:665. 1906. 



Astragalus humillimus A. Gray; Brand. Bull. U. S. Geol. Snrv. Terr. 2: 235. 1876. 

 Tragacantha humillima Kuntze, Rev. Gen. 945. 1891. 



Perennial, with a woody root and cespitose tufted caudex; stems 3 cm. high or less, covered 

 by imbricate, connate, scarious stipules; leaves 1-2 cm. long, ascending, the rachis persistent 

 and spinescent; leaflets 7—11, oblong, canescent, 2 mm. long, deciduous; peduncles short; 

 racemes 1-3-flowered; calyx-tube shorter than the subulate calyx-lobes; corolla pale; pod 

 ovate, sessile, white-pubescent, 4-5 mm. long. 



Type locality: Mesa Verde, near edge of Mancos Canon, southwestern Colorado. 

 Distribution: Known only from the type locality. 

 Illustration: M. E. Jones, Rev. Astrag. pi. 6,f. 19 [poor]. 



21. Microcystes. Perennials, usually with elongate slender stems and small leaflets. 

 Calyx-teeth subulate. Corolla small, ochroleucous, white, or purple. Pods small, inflated, 

 from ellipsoid to subglobose, less than 1 cm. long, rounded in cross-section. 



84. Phaca Thurberi (A. Gray) Kearney, Trans. N. Y. Acad. 

 14:34. 1894. 



Astragalus Thurberi A. Gray. Mem. Am. Acad. II. 5: 312. 1854. 

 Tragacantha Thurberi Kuntze, Rev. Gen. 948. 1891. 



Perennial; stems 2-3 dm. high, more or less grayish-strigose or glabrate, striate, branched; 

 leaves ascending, 6-10 cm. long; stipules triangular, distinct; leaflets 13-17, oblong or linear- 

 oblong, retuse or obtuse, 8-15 mm. long, sparingly strigose, or glabrate above; peduncles 2-5 

 cm. long; racemes about as long, 10-20-flowered; calyx strigose, the tube 2 mm. long, the lobes 

 1.5 mm. long, subulate; corolla ochroleucous or tinged with purple, 6 mm. long; pod subglobose- 

 sessile, sparingly strigose, 6-10 mm. long; seeds obliquely round-reniform, 2 mm. long. 



Type locality: Near Kronteras, Sonora. 



Distribution: Arizona, Sonora, and western New Mexico. 



Illustration: M. E. Jones, Rev. Astrag. pi. 10. f. 43. 



85. Phaca Bodini (Sheldon) Rydb. Bull. Torrey Club 

 32:665. 1906. 



Astragalus Bodini Sheldon, Minn. Bot. Stud. 1: 122. 1894. 



Astragalus debilis M. E. Jones, Rev. Astrag. 88, in part. 1923. Not A. debilis A. Gray, 1863. 



Perennial; stem slender, 3-6 dm. high, sparingly pubescent or glabrate, erect or decum- 

 bent; leaves 3-10 cm. long, ascending; stipules deltoid, acuminate, distinct, 3-5 mm. long; 

 leaflets acute at each end, 7-20 mm. long, sparingly strigose beneath, glabrous above; peduncles 

 5-10 cm. long; racemes 5-10-flowered, 2-4 cm. long; calyx strigose with short black hairs, the 

 tube 3 mm. long, the lobes subulate, 2 mm. long; corolla purple, 8-10 mm. long; banner obo- 



