28S 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, 



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

 ave 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 oblanceolate, 4-8 mm. long: pedundes aa 

 long as the leaves, stout, rather few-flowered: caljrx-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 megacar^us (Nutt.) Gray, Proc. Am. Acad. 6: 215. 1866. 

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

 aval 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 equaUng 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 obovate, 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 pmple-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 Imear 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 jxaa. long: pod membranous, inflated, ovate-lunate with an incurved 

 acumination, sessile, finely reticulated and not mottled. (4. triflorus Gray, 

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

 iNcvada. 



