LEGUMINOSAK (PEA FAMILY) 291 



flowers white or oohroleucous, tinged with purple: stipe as long as the cam- 

 panulate calyx- tube: pod flattened or compressed, straight, margined by the 

 nerverlike sutures, reflexed, 8-12 mm. long, 2— i-seeded. A. mvUifor^s. (4. 

 grallaior Wats. Zoe 3: 52. 1892; A. acerbus She\d. 1. c. 123.) — ^Very common 

 throughout our range and far northward and westward. 



63. Astragalus cam.pestTis (Nutt.) Gray, 1. c. 229. More or less pubescent, 

 somesyhat tufted, branched from the base, 1-2 dm. high: stipules triangular- 

 acuminate, the lower membranous; leaflets 7-13, or the uppermost sometimes 

 simple, mostly linear, often somew^hat rigid and subulate: peduncles few- 

 flowered, rather long and surpassing the leaves: calyx hirsute, some of the 

 hairs black; its teeth short-subulate: corolla ochroleucous, tinged with purple: 

 pod flat, from linear-elliptic to oblong, pubescent . [4. . convallarius Greene ; A . 

 demrrem. (Rydb.), Bull. Torr. Bot. Club 31 : 563. 1904; A. tenuifoUm (Nutt.) .] 

 — Colouado to Montana and Idaho. ; , ,, , 



64. Astragalus hylophilus (Rydb.) A. Nels. Very similar to the preced- 

 ing: leaves nearly erect; leaflets 15-23, lance-oljlong or narrowly elliptic, 1-2 

 cm, long, glabrate: calyx-tube dark^strigose: corolla nea,rly white; keel purphsh^ 

 tipped: pod linear-oblong, glabrous, more reflexed. {Homalobus hylophilus 

 Rydb. Mem. N. Y. Bot. Gard. 1: 247. 1900.)— Colorado to Montana. 



65. Astragalus decumbens (Nutt.) Gray, Proc. Am. Acad. 6: 229. 1866. 

 Cinereous or silky-pubescent: stems diffuse or ascending, 1-2 dm. high: pet- 

 ioles sometimes somewhat flattened, mpstly with 7-13 linear-lanceolate acute 

 leaflets: racemes 5-10-flowered: calyx-teeth attenuate, a little shorter than 

 the tube: corolla 8-10 mm. long, ochroleucous or purple; keel with a short, 

 inflexed tip: pod broad-linear, straight or falcate, 15-20 mm. long, hoary- 

 puberulent. (A. camporum Rydb. Bull. Torr. Bot. Club 32: 666. 1905.)— 

 Colorado to British Columbia. 



66. Astragalus pauciflorus Hook. Fl. Bor. Am. 1 : 149. 1838. Cinereous- 

 pubescent, dwarf, from a woody caudex, matted-decumbent, with crowded 

 leaves: leaflets 7^-11, oblong or lanceolate; the stipules all more or less con- 

 nate: peduncles i2-5rflowered: calyx-teeth very slender, exceeding the tube: 

 corolla violet: pod linear-oblong, silky-puberulent, 8-10 mm. long. {A.vexil-. 

 Kflexus Sheld.) — ^In the mountains; Wyoming into British America. 



67. Astragalus diversifolius Gray, Proc. Am. Agad. 6: 230. 1866. Ashy- 

 strigillose; stems diffuse" decimabent, elongated, 2-4 dm. high: petioles short, 

 flattened; leaves 1-5-foMolate; terminal leaflet or simple leaf linear, elongated, 

 2-5 cm. long, attenuated at each end: peduncle 1-5-flowered: calyx-teeth half 

 shorter than the tube: corolla ochroleucous or lurid, keel falcate-incurved: 

 pod oblong-linear, straight or subfalcate, 15-20 mm. long, canescent-puberulent 

 A. jiinceus. (A. junciformis A. Nels. Bull. Torr. Bot. Club 26: 9. 1899.) — 

 Aridiand sterile slopes; Colorado to Idaho. 



68. AsttagalusWingatensis Wats. Proc. Am. Acad. 18: 192. 1883. Some- 

 what canescent, the pubescence appressed: stems several, 7-15 cm. high: 

 leaflets 9-13, narrow, glabrate: calyx short, with very short teeth: corolla 

 purplish, 6 mm. long: pod flat or compressed, sessile, subacute at apex, ob- 

 tuse or somewhat narrowed at base, glabrate or black-hairy. {A. dementis 

 (Rydb.), Bull- Torr. Bot. Club 31: 562. 1894.]— New Mexico into Colorado. 



69. Astragalus Hallii Gray, Proc. Am. Acad. 6: 224. 1866. Subcinereous 

 or glabrate; stems rather stout, ascending: stipules subulate; leaflets 17-25, 

 oblong, subcxmeate, retuse^ 8-15 mm. long: peduncles exceeding the leaves; 

 flowers violet, 20 or more m a dense capitate raceme: calyx dark-pubeseerit, 

 broadly campahulate, gibbous at base; the broad teeth only one fourth as 

 long as the tube: pod oblong,' inflated, glabrous, subcoriaceous, short-stipitate, 

 islraight, 12-20 mm. long.— Colorado. 



70. Astragalus flexuosus Dougl. Hook. Fl. Bor. Am. 1: 141. 1831. Ashy- 

 puberulenti stems ascending, 2-5 dm. high, flexuous: leaflets oblong or 

 cuneate-linear, obtuse or retuse: peduncles exceeding the leaves: racemes 

 mostly elongated, loose; flowers 8-10 mm. long, white or purpUsh: calyx 

 hoary-pubescent, teeth one third as long as the tube : pod cylindric, 18-25 mm. 

 long, puberulentj thinly coriaceous, straight or subincurved; stipe very short 



