520 ■ . FABACEAE 



15 mm long; legmne ovoid, 1 cm. long, densely villous, nearly half 2-celled. 0. 

 nana Nutt. Mountains: Mont.— Wyo. PlainSuhmont . Je. 



8. A. Lagopus (Nutt.) Greene. Pulvinate perennial; leaflets 9-15, elliptic, 

 oblong or lanceolate, acute, 5-15 mm. long, loosely canescent; scape 2-7 cm. 

 long, silky villous, decumbent to erect; spike head-like; calyx densely long-vil- 

 lous; tube about 6 mm. long; teeth often dark, subulate, 3 mm. long; corolla 

 (lark bluish purple; legume long-villous, oblong-ovoid, long-acuminate, 15 mm. 

 long or less, thin, half 2-ceUed. O. Lagopus Nutt. Dry hilLs and bench lands: 

 Mont.— Wyo.— Ida. PlainSuhmont. My-Je. 



9. A. podocarpus (A. Gray) Greene. Pulvinate perennial; leaflets 11-33, 

 linear-lanceolate or oblong, 3-8 mm. long, acute; peduncles 1-3 cm. long, spar- 

 ingly hairy, 1-2-flowered; calyx dark, villous with white hairs; tube 6-7 mm. long; 

 teetli lanceolate, 2-3 mm. long; corolla dark bluish purple, about 15 mm. long; 

 legume stipitate, finely black-hairy; body ellipsoid, 15-20 mm. long, abruptly 

 contracted into a short beak. 0. podocarpa A. Gray. Arctic-alpine regions: 

 Lab.— Alta.-^Colo.— Ida.— B.C.— Yukon. Subalp.—Alp. Jt^Jl. 



10. A. Hallii (Bunge) Rydb. Pulvinate perennial; leaflets 11-19, narrowly 

 oDiong or lanceolate, densely silky-canescent, about 5 mm. long; peduncles 1-3 

 cm. long, grayish strigose; calyx black, villous with white hairs; tube scarcely 5 

 mm. long; teeth lanceolate; corolla bluish purple, about 1 cm. long. 0. Hallii 

 Bunge. High mountains: Colo. Subalp.—Alp. Je. 



uJ^'i f ■ "'^^oPliil^s (A. Gray) A. Nels. Pulvinate perennial; leaflets 7-lb 

 l^Ro ? Q fl"" ^^^°^^' densely white-silky, 4-8 mm. long; peduncles 1-3 cm. long; 

 tJ^kf «K I^^'^""^ ,' capitate; calyx densely hirsute-villous, partly black-hairy; 

 tube about 5 mm. long; teeth subulate, 2-3 mm. long; corolla purple, 10-12 mm. 



Mn?;T.rJ!f '^'' TT?''P'T'. ^'■''^^1^ ^^^«"^' ^bout 1 cm. long. O. oreophila A. Gray. 

 Mountains: Utah— Ida. Monl.—Subalp. Jl. 



ohlZ-tJ'l^^J ^^■^S'flL Greene.^ Pulvinate perennial; leaflets^ 15-19, 



l-4-flowered; calyx 



Inntr- i^/C/i f j " *' -^^.''" o^l-uicilc, o mm. long; coroua purple, aDoui lo miu- 

 thinir n ^^^^^^P^' coriaceous, densely canescent, about 2 cm. lone, 6 mm. 

 ~Alp jj^'''''"^/* ^'^- <^ray. High mountains: N.M.— Colo.— (? Mont.). Mont. 



th^l^\ ^' ^^,^°P^y?Jus Rydb. Leaflets 7-11, hnear-lanceolate, generally less 

 c»]^ i-iL™' -ir^' ^i^X^"^ ^^^*^' ^^^ appressed pubescence, mostly involute; 

 ^n^c Z ^''^''"^' ^7 mm. long; teeth subulate, 3^ mm. long; coroUa purple; 

 r^itfoi 1 ^®'' "^"ow, deeply emarginate; pod similar to that of the next, but 

 scarcely 15 mm. long. Dry hillsides: Mont. Submont. Je-Jl. 



«ni-?*" ^' ^^^f^^ ^ydb. Leaflets 11-25, oblong-lanceolate, 1-2 cm. long, acu^e, 

 S "ST'^''' I ' • ^P^. ^r^ dm. high; spike dense, 3-5 cm. long; calyx silky-vil- 



n^^lT K "i^o^^''',' ^""^^ ^ ^"^- l«^g; teeth subulate, 4-5 mm. long; corolla 

 noI?i .'o 1 '^^-Jong; wings very broad, deeply emarginate; pod ovate-oblong, 



^nf P«i''°'d °p^' ^ ■""?.• *^'^^' silky-villous , half 2-celIed. O argentata Pursh, 

 rSes^ Mont-wTo^^^^^^^^^^ ^- venfosus Greene. Dry hill- 



vJllnn; ^' f *^oP^rpureus Rydb. Leaflets oval to oblong, canescently silky- 

 raremp fl^n^ ™™i i«°?,' .P^tuse or acute; scape 6-10 cm. long, loosely viUous; 

 Sirs tPPf^ Kl fi*'-''^"^'"^^ ^''^y'' dark, villous, with mixed black and white 

 mm lon^ xJ^L^^ '7' ^^^^?te, 4 mm. long; 'corolla dark-purple, about 15 

 ^read^nf 'b^-^ if P^^ emarginate; pod ovoiJ, less than 1.5 cm long, with a 

 spreading beak, yilloug, thm. half 2-celled. Mountains: Wyo. Submont. JL 



\nni\t:r^T''^?v^''^^^^ G/^o^°®- I^eaflets elliptic, often obtuse, 5-10 mm- 

 on§'- caT.TLf^'K'^'P^.^-^-^u™- ^'^^> minutely' strigose; raceme 2-3 cm. 

 anfmlS 2^r ^ pubescent, wath partly black hairs; tube 5 mm. long; teeth 



slSv rfr;?r^^V "1^' f'^'S^ P'^'P^^' ^^^^t 12 mm. long; wings rather narrow, 

 balksf S'-lS. ^?L7n'^ ^ P*^"^^* *^P- Oxytropis tmbeSli S Hook. Dry 



