OxYTROPis. LEGUMINOS^. 341 



/ff. speciosa : leaflets b^oa(ler and more silky ; flowers larger. — O. canipes- 

 tris y. sulphurea, Hook. ! I. c, not of DC. ? 



y. spicata (Hook. ! 1. c): spikes elongated; flowers more n-mote. 



i. glabrata {\loo\i.\ I.e.): leaflets almost glabrous and somewhat suc- 

 culent. 



«. melanocephala (Hook.! 1. c.) : smaller; calyx villous with blackish 

 hairs. 



a. a. & y. British America, west to the Pacific ! i. &, t. Arctic and 

 Subarctic America! — Leaflets variable in number and breadth, usually 8-10 

 pairs, lanceolate and approximated, in y. & <5. rather remote. Scapes 4-12 

 inches long, mostly longer than the leaves. Legumes about an inch long, 

 terminated with a long oblique ensiform point. — This species is a native also 

 of the mountains of Europe. Hooker considers his var. sulphurea (our/?.) 

 as probably identical with O. sulphurea, Lrdeh. cf Fisch. (O. campestris y. 

 sulpimrea, DC.) ; but our specimen of that plant, received from Dr. Fi-scher, 

 has the leaflets much narrower, more acute, and closely approximated. 



13. O. viscida (Nutt. ! mss.) : "stemles«, coespitose, hairy and viscid ; leaf- 

 lets numerous (16-29 pairs), oblong-lanceolate, somewhat acute ; peduncles 

 longer than the leaves; stipules pilose, membranaceous, with a long acumi- 

 nation; spikes subcvlindrical ; bracts as long as the calyx; teeth of the calyx 

 subulate, about the length of the tube ; legumes short, terete, pubescent, acu- 

 minate. 



'• Rocky Mountains, near the sources of the Oregon. — Scapes about 14 

 inches high. Flowers rather smaller than in O. Uralensis." Nutlall. 



14. O. mnlticeps (Nutt.! mss.): nearly stemless, cBe«pitose, canescently 

 silkv ; caudex divided above into numerous heads ; leaflets 3-4 pairs, ellipti- 

 cal-lanceolate; stipules adnate to the petiole, ovate, acute, membranaceous; 

 scapes longer than the leaves, 2-3-flowered ; bracts ovate ; legumes ovale, 

 acuminate, wholly included in the inflated calyx, half 2-celled." 



Summit of lofty hills in the Rocky Mountain range, towards Lewis's 

 River. — Nnttall! Plant forming beautiful silvery tufts about 3 inches 

 high. Leaflets about i of an inch long. Calyx at length somewhat gla- 

 brous; the teeth subulate, ^ the length of the tube. Legumes compressed 

 cqjitrary to the sutures, pubescent, about 8-seeded. — A well marked species, 

 biit perhaps not referred to its proper section, as the flowers are unknown. 

 The legume, however, is truly that of Oxytropis. 



§ 2. Acaulescent: leaflets mostly rerticillate or fascicled. — Verticil- 

 lares, DC. 



15. O. splendens (Doug\.): stemless; leaflets verticillate in threes and 

 fours, lanceolate, very acute, silky ; scapes longer than the leaves, clothed (as 

 likewise the petioles) with spreading hairs ; flowers somewhat remote, erect- 

 spreading ; calyx very hairy, white ; legumes ovate, partly 2-celled, erect, 

 acuminate, hairy, much longer than the calyx. — Hook.! Jl. Bor.-Am. 1. p. 

 147. 



a. vestita (Hook. 1. c): very hairy ; bracts much longer than the calyx. 



P. Richardsonii (Hook.! 1. c): less hairy ; bracts scarcely as long as the 

 calyx.— O. oxyphylla, Richards, app. Frankl. jour. ed. 2. ]j. 28, not of 

 Pall. 



British America, from the Saskatchawan and Red Rivers, north to Bear 

 Lake and west to the Rocky Mountains, Douglas, Richardson .'—hea^ets 

 5-10 lines long, those of the primary leaves often smaller and nearly ovate, 

 sometimes 5-6 in a whorl. Scapes' S-12 inches high. Spike 2 inches long. 

 Flowers large, bright blue. Legume pointed with a long straight beak. 



