30 SYNOPSIS OF THE FLORA OF COLORADO. 



spatulate-lanceolate, acute, frequently involute, crowding the extremities 

 of the usually short (') branches ; scapes scarcely exceeding the leaves, 

 2-3-flowered; flowers" 3" long, purple, the banner and the wings longer 

 than the strongly arphed keel ; calyx- teeth nearly equaling the obconical 

 tube ; legume 4" long, half included in the calyx, oblong, acute, sub- 

 compressed, glabrous, thick and coriaceous, 1-celled, the ventral suture 

 straight and very acute, the dorsal gibbous, about 12-ovuled. "Found 

 by Nuttall near the sources of the Platte." 



ASTRAGALUS KENTROPHYTA, Gr. Rev. 1. c., p. 231. Perennial, 

 intricately branched from a long root, broadly-depressed-crespitose, 

 hoary with a short, silky pubescence ; stems 2'-4' long ; stipules mem- 

 branous, mostly connate, often setaceously or spinosely acuminate ; leaf- 

 lets 2-3 pairs, 2 // -4 // long, linear- subulate, usually rigid and divaricate, 

 pungent, not jointed with the rachis ; flowers 1-3, on short pedicels in the 

 axils of the leaves, 2" long, ochroleucous or tinged with violet ; calyx-teeth 

 setaceous, equaling the cainpanulate tube; pods 2 // -3" long, sub-charta- 

 ceous, compressed, sessile, pubescent, ovate, acuminate, somewhat in- 

 curved, 1-celled, 3-4-ovuled, 1-2-seeded, the valves separating at matur- 

 ity. Hall & Harbour, 10G; .Cariby; B. H. Smith. South Park, Porter ; 

 Brandegee. 



ASTRAGALUS TRIDACTYLICUS, Gr. Proc. Am. Acad., v. 6, p. 527. Pe- 

 rennial, ca3spitose from a short woody caudex, dwarf, 2 / -3 / high, silvery- 

 silky ; leaves pinnately 3- foliate, long-petioled, exceeding the sessile, 

 crowded flowers ; leaflets oblanceolate, G" long, acute ; flowers 5" long, 

 pale purple ; calyx-teeth equaling the tube ; pod globose, ovoid, 3"-4" 

 long, very turgid, puberulent, 12-ovuled, 3-4-seeded ; calyx deciduous, 

 exposing the pod. St. Train Canon, May 26, Coulter. 



ASTRAGALUS SERICOLEUCUS, Gr. Rev. 1. c., p. 232. Very broadly 

 caespitose, silky-hoary ; stems branched, prostrate ; branches covered 

 with the villous stipules; leaves all 3-foliolate, not equaling the 2-G-flow- 

 ered, filiform peduncles ; leaflets 3" long, oblanceolate or ctineate-obloiig ; 

 calyx-teeth about equaling the cainpanulate tube; corolla purple, 3"-4" 

 long; pod ovate-oblong, 3" long, hoary, half included in the calyx. 

 Sand-hills along the Platte, Hall & Harbour, 145. 



OXYTROPIS MULTICEPS, Nutt. Canescently-silky, I'-S'-high ; stems 

 matted crespitose, from a branching caudex ; leaflets 3-4 pairs, oval, 3" 

 long; flowers purple, 6" long; fruiting calyx inflated, globose, including 

 the ovate, chartaceous-membranous pod; pod short-stipitate, sometimes 

 half 2-celled by the intrusion of the ventral suture. " Subalpine and 

 lower." Hall & Harbour, 144; Parry, 191. Boulder Canon, Coulter. 



OXYTROPIS URALENSIS, L., var. PUMILA, Ledeb. Acaulescent, silky- 

 villous; leaflets 4-5 pairs, conjugate, 3" long, oblong-linear, re volute; 

 stipules long-adnate; scapes l'-2' long, 2-5-flowered; flowers violet- 

 blue; pod oval-oblong or long-oblong, ventral septum extending to the 

 dorsal suture. High alpine. (0. arctica, R. Br.,) Hall & Harbour, 143. 

 Mount Lincoln at 14,000 feet elevation, Coulter. 



OXYTROPIS CAMPESTRIS, L. Parry. 



OXYTROPIS LAMBERTI, Pursh. Very abundant on the plains and in 

 the mountains. Hall & Harbour, 140; Dr. Smith; B. H. Smith; Ccuiby ; 

 Meelian ; Porter ; Brandegee ; Coulter. 



OXYTROPIS NANA, Kutt. Gr. Proc. Am. Acad. G, p. 23G. Ciespitose, 

 much divided, silky-canescent with a very close, appressed jjubescence ; 

 leaves very crowded; leaflets 3-4 pairs, obovate, 3" long; scapes 2 / -3 / 

 high, scarcely exceeding the leaves, 3-12-flowered ; flowers capitate, 



