LEGUMINOSAE (PEA FAMILY) . 287 



duncles shorter than the leaves, slender, 3-8-flowered : calyx-teeth much 

 shorter than the cylindrical tube: corolla light violet, 14-18 mm. long: pod 

 1-2 cm. long, thick, coriaceous, sessile, ovate-oblong, acuminate, somewhat 

 arcuate, sometimes sulcate ventrally, rugosely reticulate and subpubescent, 

 many-seeded. (Phaca pygmaea Nutt.; A. uintensis Jones.) New Mexico 

 and Arizona to Wyoming and Idaho. 



29. Astragalus amphioxus Gray, Proc. Am. Acad. 13: 366. 1878. Re- 

 sembling both A. missouriensis and A. Shortianus except in the pods which 

 are acute at both ends, the base so much narrowed that it often seems stipi- 

 tate in the calyx, texture much thinner, fore-and-aft compression greater, 

 and moderately curved in the shorter pods, but strongly so in the longer ones: 

 leaflets more apt to be oblong and acute. Colorado to Texas and Arizona. 



30. Astragalus cibarus Sheld. Bull. Geol. & Nat. Hist. Surv. Minn. 9: 

 149. 1894. Glabrate or sparsely pubescent: stems several from the crown, 

 decumbent-spreading, 1.5-3 dm. long: leaflets 11-17, suborbicular to oblong, 

 obtuse or retuse ; stipules sub foliaceous: flowers subcapitate, 12-15 mm. long: 

 calyx oblong-campanulate, black-strigose ; the narrow teeth one third as long 

 as the tube: corolla ochroleucous and purple: pod coriaceous, narrowly ob- 

 long, pointed at both ends, glabrous and transversely rugose-veined at ma- 

 turity, the ventral suture strongly intioflexed. Wyoming to Utah and Idaho. 



31. Astragalus Beckwithii T. & G. Pac. R. R. Rep. 2: 120. 1855. Glabrous 

 or nearly so: stems diffusely spreading, 3-6 dm. long: stipules adnate; leaf- 

 lets 13-25, broadly oval, 10-14 mm. long: flowers ochroleucous, in a short 

 loose raceme: calyx-tube glabrous, campanulate; the subulate teeth subequal: 

 pod 2-3 cm. long, glabrous, transversely rugulose, coriaceous, stipitate, some- 

 what obcompressed, flattened dorsally with the suture slightly intruded, 

 bisulcate ventrally with the prominent suture acutely margined, many- 

 seeded. Wyoming and Colorado to Nevada. 



32. Astragalus Parryi Gray, Am. Journ. Sci. II. 33: 410. 1862. Stems 

 short and prostrate, villous with loose spreading hairs: leaflets oblong, ellip- 

 tic, or obovate: flowers few, loosely subcapitate on rather short peduncles, 

 whitish or yellowish, tinged with purple, 12-16 mm. long: calyx-teeth 

 half shorter than the cylindric tube: pod pubescent, oblong-lanceolate, 

 2.5 cm. long or more, arched or at length circinate, strongly obcompressed 

 and rugulose, both sutures sulcately impressed, contiguous. Wyoming to 

 Texas. 



33. Astragalus glareosus Dougl. Hook. Fl. Bor. Am. 1: 152. 1833. Vil- 

 lous silky with white incumbent hairs: depressed-caespitose, the stems short 

 or nearly wanting: leaflets 11-15, linear-oblong: peduncles not exceeding the 

 leaves, few-flowered: calyx-tube narrowly cylindric, with teeth one third as 

 long: corolla narrow, bright violet: pod oblong-ovate, attenuate above, in- 

 curved, silky-pubescent, becoming glabrate. (A. argophyllus Nutt.) -Col- 

 orado to Idaho. 



34. Astragalus Purshii Dougl. Hook. Fl. Bor. Am. 1: 151. 1833. Canes- 

 cent with a long and dense woolly pubescence, nearly acaulescent: leaflets 

 9-17, lanceolate or oblong, 6-10 mm. long: peduncles 5-12 cm. long: flowers 

 rather large, about 2 cm. long, ochroleucous, the keel mostly purple- tipped : 

 pod coriaceous, very densely white-woolly pubescent, somewhat arcuate, 

 about 2 cm. long. Colorado to Montana and west to Nevada. 



35. Astragalus utahensis T. & G., Gray, Proc. Am. Acad. 6: 213. 1866. 

 Resembling the preceding but subcaulescent, the short stems prostrate: 

 pubescence dense, woolly, appressed: leaves suborbicular, 4-7 mm. long: 

 flowers dark purple: pod moderately sulcate at the sutures, inordinately 

 white-woolly. Western Wyoming and Colorado to Nevada. 



36. Astragalus Newberryi Gray, Proc. Am. Acad. 12: 55. 1877. Nearly 

 acaulescent, silvery-silky; the stems very short, crowded on the crown of a 

 deep-set elongated root: leaflets 3-7, broadly to narrowly obovate, approxi- 

 mate: peduncles few-flowered: corolla large, ochroleucous: pods sessile, turgid, 

 ovate-oblong, the broad point laterally compressed, villous. Western Colo- 

 rado to Utah and Arizona. 



