LEGUMINOSAE (PEA FAMILY) 



but evident. (A . proximus and A. salidae Rydb. Bull. Torr. Bot. Club 32 : 667. 

 1905.) Common at middle elevations; Colorado and Nebraska to Manitoba. 



71. Astragalus Bodinii Sheld. 1. c. 122. Subglabrous slender perennial: 

 stems ascending or prostrate, 3-7 dm. long, branched, striate: leaflets 11-17, 

 narrowly obovate to lanceolate, abruptly acute, 7-12 mm. long; stipules 

 ovate-acuminate: peduncles 6-7 cm. long, dark-strigillose, rather few-flowered: 

 calyx campanulate, purplish, and nigrescent: corolla purple, 8-10 mm. long: 

 pod short-stipitate, chartaceous, oblong, flat, 1 -celled and often only 1 -seeded. 

 Wet low meadow lands; Colorado and Wyoming. 



72. Astragalus Fendleri Gray, PI. Wright. 2: 44. 1853. An erect peren- 

 nial, 2-4 dm. high, glabrous or appressed-pubescent: leaflets oblong or linear- 

 oblong: racemes long-peduncled, loosely flowered; flowers purple: pod oblong, 

 inflated, chartaceous-coriaceous, about 20 mm. long, straight, pointed, mi- 

 nutely puberulent, the stipe very short or wholly wanting. Colorado to New 

 Mexico. 



73. Astragalus lonchocarpus Torr. Pac. R. R. Rep. 4: 80. 1857. Ashy- 

 puberulent or glabrate perennial: stem fistulous, sulcate, branched, 5-7 dm. 

 long: stipules distinct, small; leaflets 1-5, linear or filiform-linear, remote, the 

 leaf sometimes reduced to the flattened filiform rachis: racemes loosely 

 many-flowered, on long, strict, stoutish peduncles; bracts one half shorter 

 than the pedicels; flowers whi^e, pendent: calyx-teeth broad-subulate, much 

 shorter than the tube: pod membranous, lanceolate-cylindrical, straight, 

 3-4 cm. long, very sharply acuminate at each end, exsert-stipitate, glabrous, 

 neither suture intruded. (Phaca macrocarpa Gray, PL Fendl. 36. 1849.) 

 Colorado. 



74. Astragalus triphyllus Pursh, Fl. Am. Sept. 2: 740. 1814. A caespitose 

 perennial, from a much branched woody caudex, with crowded leaves, silvery 

 and glossy silky: stipules glabrous; primary leaves sometimes 5-foliolate wit 

 cuneate oblanceolate leaflets, the rest with three longer lanceolate leaflets 

 long-petioled, exceeding the sessile crowded flowers: calyx-teeth half shorte 

 than the tube: corolla ochroleucous or white: pod villous, included, conical 

 ovate, acuminate, somewhat coriaceous. (A. gilviflorus Sheld.; Phaca caes 

 pitosa Nutt.) From Nebraska and Wyoming to the Saskatchewan. 



75. Astragalus tridactylicus Gray, Proc. Am. Acad. 6: 527. 1866. Peren 

 nial, caespitose from a short woody caudex, dwarf, 5-8 cm. high, silvery 

 silky: leaves pinnately 3-foliolate, long-petioled, exceeding the sessile crowdec 

 flowers; leaflets oblanceolate, 10-12 mm. long, acute: flowers 1 cm. long, pale 

 purple: calyx-teeth equaling the tube: pod globose, ovoid, 5-8 mm. long, ver 

 turgid, puberulent, 12-ovuled, 3-4-seeded: calyx deciduous, exposing th 

 pod. Colorado and Wyoming. 



76. Astragalus sericcfleucus Gray, 1. c. 232. Very broadly caespitose 

 silky-hoary; stems branched, prostrate; branches covered with the villou 

 stipules: leaves all 3-foliolate, not equaling the 2-6-flowered filiform peduncles 

 leaflets 6 mm. long, oblanceolate or cuneate-oblong : calyx-teeth about equal 

 ing the campanulate tube: corolla purple, 6-8 mm. long: pod ovate-oblong 

 6 mm. long, hoary, half included in the calyx. Colorado to Dakota anc 

 Nebraska. 



10. ARAGALLUS Neck. Loco 



Like Astragalus, but distinguished by a subulate beak at the tip of the keel 

 Mostly low perennials, with tufts of numerous very short stems from a ban 

 :ml thick root or rootstock, covered with scaly adnate stipules. Leaves pin 

 nate, of m:iny leaflets. Scapes naked, bearing a head or short spike of flowers 

 Oxytropis. 



Stipuli-s frcr; p,,,l i -celled 1. A deflexus. 



Stipules a 1 1 natr to th ( . petiole. 

 I'ml mclmlcil in the calyx. 

 ('aly\ lila.ll-i-\ inflated, not distended by the pod. 



waif am I caespitose; flowers purple .... 2. A. multiceps. 

 rlunts 1-2 <lm. high; flowers ochroleucous . . . 3. A. collinus. 



