LEGUMINOSAE (PEA FAMILY) 285 



fine lax pubescence beneath: spike short; the flowers subsessile, 10-12 mm. 

 long: corolla white or ochroleucous; the wings and keel often purple-tipped: 

 pod membranous, inflated, ovate, 2-celled, more or less pubescent, about 

 2 cm. long. The northern counterpart of A. Fremontii T. & G. of the south- 

 western deserts; Wyoming, Utah, and probably northward. 



13. Astragalus Drummondii Dougl. Hook. Fl. Bor. Am. 1: 153. 1833. 

 Loosely woolly-pubescent: stems growing in clumps, very leafy, suberect, 

 3-5 dm. high: leaflets 17-31, oblong to oblanceolate, obtuse, 1-2 cm. long: 

 calyx black-hairy, its teeth shorter than the tube: flowers rather large, white 

 or slightly yellowish, in long crowded racemes: pod long-linear, terete, with 

 a deep narrow sulcus, obcordate in cross section, 1-celled but the dorsal 

 suture intruded. Frequent on gravelly slopes. 



14. Astragalus scopulorum Porter, Fl. Col. 24. 1874. Puberulent with 

 appressed hairs: stems ascending, 2-4 dm. high, branching: leaflets 17-27, 

 obovate or oblong, acute, glabrous above: peduncles longer than the leaves; 

 the racemes loosely many-flowered: calyx gibbous at base, pilose with black- 

 ish hairs, the subulate teeth about half as long as the cylindrical tube: corolla 

 yellow or yellowish, 15-20 mm. long: pod stipitate, 2-3 cm. long, pendulous, 

 sharply 3-angled, the dorsal suture salient, with an acute sulcus on each side 

 intruded halfway to the ventral, at length arcuate. Colorado. 



15. Astragalus racemosus Pursh, Fl. Am. Sept. 740. 1814. Appressed- 

 pubescent or glabrate: stem 3-6 dm. high, rather stout, very leafy: leaflets 

 17-23, mostly linear-oblong, mucronate, 12-15 mm. long: peduncles about as 

 long as the leaves, loosely many-flowered; the flowers nodding and somewhat 

 secund: calyx strongly gibbous, puberulent: corolla ochroleucous, 15-18 mm. 

 long: pod lance-oblong, glabrous, 3-angled, 1-celled, broadly sulcate and with 

 the dorsal suture somewhat intruded. Kansas to Utah and Northwest Terri- 

 tory. 



16. Astragalus alpinus L. Sp. PI. 760. 1753. Glabrous or subpubescent: 

 stems slender, diffuse, 5-15 cm. long: leaflets 13-25, oval or elliptic, obtuse 

 or retuse: peduncles mostly surpassing the leaves; the flowers few, sub- 

 capitate: calyx campanulate: corolla violet-purple, or pale with purple- or 

 blue-tipped keel: pod narrowly oblong, short-acuminate, black-pubescent, 

 triangular-turgid, deeply sulcate dorsally, its stipe as long as or longer than 

 the calyx. [A.giganteus (Pall.) Sheld. is merely the larger specimens.) From 

 Colorado to Manitoba and thence across the continent; also Europe and Asia. 



17. Astragalus sparsiflorus Gray, Proc. Am. Acad. 6: 205. 1866. Gla- 

 brate or somewhat appressed-pilose: stems slender, 2-4 dm. long, branched: 

 leaflets 9-13, obovate or suborbicular, 4-5 mm. long: peduncles 3-10-flowered : 

 corolla white or violet-tinged, 5-6 mm. long, the standard and wings much 

 longer than the incurved keel: pod small, incurved, strigillose, very short- 

 stipitate, the dorsal suture intruded, the ventral suture acute and prominent. 

 Colorado. 



18. Astragalus desperatus Jones, Zoe 2: 243. 1891. Strigose-pubescent 

 throughout: caespitose from a woody root: stipules scarious and imbricated; 

 leaflets 13-17, oval to orbicular, 3-7 mm. long: peduncles exceeding the 

 leaves: flowers many, at first subcapitate, later racemose, soon reflexed, 

 purple, 10-12 mm. long: pod sessile, reflexed, thin-chartaceoue, falcate, 

 acute, 10-12 mm. long, cordate in cross section by the intrusion of the ven- 

 tral suture, long-hairy. Utah and Colorado. 



19. Astragalus aboriginorum Rich. Frank. Journ. 736. 1823. Hoary- 

 pubescent or subvillous: stems numerous, ascending, rigid, 1-3 dm. high: 

 stipules triangular, mostly free; leaflets 7-13, linear to oblong-lanceolate, 

 acute: peduncles exceeding the leaves, with small flowers in a compact raceme: 

 the filiform calyx-teeth not equaling the tube: corolla white or tinged with 

 violet: pod long-stipitate, reflexed, somewhat membranous, laterally subcom- 

 pressed, straight dorsally, the ventral suture arcuate, 10-15-oyuled. Moun- 

 tains of Colorado and northward throughout W. British America. 



20. Astragalus glabriusculus (Hook.) Gray, Proc. Am. Acad. 6: 204. 

 1866. Much like the last: green, the leaflets glabrous above and nearly so 



