OXYTR0PI3. LEGUMINOS.^. 339 



lefrunies erect, oblonsr, acuminate, and (with the calyx) clothed with black 

 hairs. R. /ir.—IIonk. ! jl. lior.-Am. 1. p. HCi. 



a. snbinnbi'llala (Hook. ! I. c.) : heads 2-4-Howered. — O. arctica,/?. llr.! in 

 app. Parry's l.s-/ voy. p. 27S ; DC. prodr. 2. p. 276. 



p. minor (Hook.! 1. c.) : densely silkv ; Howers solitary. 



y.inftala {Hook'. 1. c): leaves and inflated legumes somewhat glahrons. 



a. &. p. Arctic islands and shores! y. Highest summits ot the Hocky 

 Mountains. — Probably, as Hooker suggests, not distinct from the preceding 

 species. 



4. O.foUosa (Hook.) : stemless, canescently hairy; leaflets numerous, ap- 

 proximated, ovate or oblong-ovate, rather acute ; scapes longer than the leaves, 

 hairy; heads broadly ovate (sTnall) ; flow> rs crowded, spreading, the lower ones 

 reflexed ; bracts linear-lanceolate, shorter than the calyx ; legumes rather re- 

 mote, deflexed, cylindrical, acute, clothed (as well as the calyx) with blackish 

 hairs. Hook. ! fl. Bor.-Am. ]. p. 276. 



Saskatchawan River! west to the Rockv Mountains, Hooker. — Leaves 

 3-4 inches long: leaflets 11-14 pairs, one-third ol'an inch long, clothed with 

 appressed hairs. Scape about as long as the leaves ; the pubescence spread- 

 ing. Teeth of the calyx nearly as long as the lube. "Legumes about one 

 inch long: stipe short, included in the calyx." Hook. 



5. O. Lamberti (Pursh): caespitose and stemless; leaflet? numerous [5-8 

 pairs], linear-lanceolate, strigose, rather remote ; common petiole very long; 

 scape longer than the leaves; spikes oblong; bracts lanceolate, shorter than 

 the silkv calyx. Null.— Pursh, fl. 2. p. 740; Nuit. ! gen. 2. p. 98 ; DC. prodr. 

 2. p. 277. 



0. silky-pilose; leaflets 10- 14 pairs, lanceolate; hairs of the calyx partly, 

 and of the sheathing stipules wholly, dark. — O. Lamberti P. Hook.! fl. Bor.- 

 Am. 2. p. 147. 



;■. flowers larger, more remote, spreading. — O. Lamberti, Sims, hot. mag. t. 

 2147; Lindl. bol. reg. t. 1054. O. Lnmberti a. Honk. I. c. 



5. ? lanceolate leaflets (6-9 pairs) and stipules much less hairy ; heads few- 

 flowered, the flowers partly spreading ; calyx with a mixture of blackish 

 hairs. 



c. very dwarf, canescently woolly ; the leaflets shorter and about 5 pairs ; scape 

 scarcely longer than the leaves ; flowers capitate or nearly so ; calyx dense- 

 ly woolly ; bracts small and short ; wings emarginate. — O. Lamberti ff 

 leucophylla. A'"//. ?n.<s. 



Woodless hills of the Missouri, from the Platte to the mountains, Nvttallf 

 Dr. James! /?. Saskatchawan! to the Rocky Mountains, Douglas, Drum- 

 mond. y. Canada (Hook.) i. near Q,u bee, Mrs. Percival! i. Plains of 

 the Platte, Nnttall. May.-June. — Flowers bright purple. — Allied to O, 

 grandiflora and O. ambigua, and not far removed, as Hooker thinks, from 

 som;^ Slates of O. Qralensi-. We have not seen the mature legumes. Ac- 

 cording to Nuttall they are glabrous, black, ?mall, somewhat terete, acuminate, 

 and partly 2-celled. 



6. O. sericea (Mutt. ! mss.): "stomle.-<s, somewhat cn?spitose, shining and 

 whitish with appressed silkv hairs; leaflets linear-oblong or lanceolate (ibose 

 of the primary leaves elliplical and obtuse) ; scapes longer than the leaves; 

 spikes short, elongatid in fruit ; bracts lanceolate, acuminate, shorter than 

 the calyx; teeth ofth? calyx short and subulate; legumes somewhat cylindri- 

 cal. acu;ninat'\ 2-colled, canescently pubescent." 



Rocky Mountains. Nnttall! — Leafl is about f of an inch long. Wings 

 emarginate. Scapes stout and rigid in fruit. Legumes (including the beak) 

 nearly an inch long, coriaceous, compressed contrary to the sutures, — ]\\aily 

 related to O. Lamberti. 



