288 LEGUMINOSAE (PEA FAMILY) 



37. Astragalus ceramicus Sheld. 1. c. 19. Sparingly hoary with a loose 

 silky pubescence: roots filiform: stipules subulate, rigid, persistent, connate 

 at base; leaflets 7-15, narrowly linear or filiform, 1-5 cm. long, some or most 

 of them usually abortive: flowers few, rather small; keel with the inflexed 

 apex somewhat produced, pale rose-color: pod 12-30 mm. long, mottled with 

 purple blotches, ovoid, short-stipitate, stipe equaling the calyx, barely pointed, 

 pendent. A. pictus (name untenable). The varieties often listed seem to 

 have no constant characters. Idaho to New Mexico. 



38. Astragalus Eastwoodiae (Jones) Rydb. Bull. Torr. Bot. Club 32: 664. 

 1905. Densely branched from the base, 10-15 cm. high, glabrous throughout: 

 leaflets 15-25, mostly narrowly ob lanceolate, 4-8 mm. long: peduncles as 

 long as the leaves, stout, rather few-flowered: calyx-teeth one fourth as long 

 as the tube: corolla purple, 16-20 mm. long: pods oblong-oval, contracted 

 at both ends, very acute, ventrally sulcate, with the suture intruded, char- 

 taceous and inflated, reddish but not spotted, 15-18 mm. long. Colorado to 

 Utah. 



39. Astragalus artipes Gray, Proc. Am. Acad. 13: 370. 1878. Glabrous, 

 from a perennial caudex: stipules adnate; leaflets 11-17, oblong to oval, 

 about 8 mm. long: peduncles shorter than the leaves, its few flowers crowded; 

 the pedicels suberect, shorter than the calyx: calyx campanulate; its long- 

 subulate teeth as long as the tube: corolla white and purple: pod ovate, 

 bladdery-inflated, mottled with purple, attenuated into a slender stipe 

 which is articulated above the calyx. Western Wyoming to Colorado and 

 Arizona. 



40. Astragalus megacarpus (Nutt.) Gray, Proc. Am. Acad. 6: 215. 1866. 

 Glabrous, somewhat caespitpse and nearly stemless: leaflets 9-13, broadly 

 oval or ovate, usually emarginate: scape 3-6-flowered, much shorter than the 

 leaves: flowers ochroleucous or whitish, 20-25 mm. long: calyx cylindrical; 

 its subulate teeth long: pod ovate-oblong, acuminate, very obtuse at base, 

 obscurely and sparsely strigillose, 4-6 cm. long; the stipe very short. Low 

 saline soils; Wyoming and Colorado to Utah. 



41. Astragalus americanus (Hook.) Jones, Contrib. W. Bot. 8: 8, 1898. 

 Nearly or quite glabrous, rather tall and leafy: leaflets 13-19, ovate or elliptic- 

 oblong: peduncles equaling the leaves; the racemes many-flowered; flowers 

 white : pod with a stipe equaling or exceeding the calyx, acute at each end, 

 glabrous or shining. [Phaca americana (Hook.) Rydb. Mem. N. Y. Bot. 

 Gard. 1: 245. 1900.] Colorado to arctic America. 



42. Astragalus Wetherillii Jones, Zoe 4: 34. 1903. Glabrous or sparsely 

 pubescent above: stems crowded on the crown of a woody root, 3-5 dm. high: 

 leaflets 9-19, oval to pbovate, obtuse or retuse: peduncles short, capitately 

 few-flowered: calyx nigrescent, with short hairs: corolla white, with pink- 

 tipped standard and keel: pods articulated to a short stipe, inflated, obliquely 

 ovate, the base rounded and the apex short-acuminate, sulcate ventrally 

 only, the suture intruded, 15-25 mm. long, not pendulous or spotted. Col- 

 orado. 



43. Astragalus cerussatus Sheld. 1. c. 139. Loosely pubescent through- 

 out; stems erect or spreading, 2-3 dm. high: leaflets 9-17, narrowly oblong, 

 emarginate, 6-12 mm. long: peduncles slender, exceeding the leaves, loosely 

 3-5-flowered: calyx campanulate, the filiform teeth spreading and longer than 

 the tube: corolla ochroleucous, the keel purple- tipped : pod thin-chartaceous, 

 inflated, ovate-oblong, finely reticulated, often purplish but not mottled, 

 nearly glabrous, the ventral suture intruded nearly to the middle. Colorado. 



44. Astragalus Geyeri Gray, 1. c. 214. A low nearly simple annual, 1-2 

 dm. high; subcanescent with appressed pubescence: leaflets linear to oblong, 

 obtuse, glabrous above: peduncles shorter than the leaves, 3-5-flowered: 

 calyx-teeth subulate, as long as the campanulate tube: corolla ochroleucous, 

 about 6 mm. long: pod membranous, inflated, ovate-lunate with an incurved 

 acumination, sessile, finely reticulated and not mottled. (A. triflorus Gray, 

 probably, as to the Colorado specimens.) From Wyoming to Idaho and 



