524 . FABACEAE 



2. H. americanum (Michx.) Britton. Stem 2-7.5 dm. high, glabrous or 

 nearly so; leaflets 11-21, oblong, 1.5-3 cm. long, rounded at both ends, glabrous 

 above, sparingly hairy beneath; raceme lax; calyx-tube 2 mm. long; teeth 

 triangular, 1-2 mm. long; corolla violet, rarely white, 12-18 mm. long; loment 

 glabrous or nearly so; internodes 3-5, about 5 mm. wide. H. alpinum ameri- 

 canum Michx. H, philoscia A. Nels., a white-flowered form. Rocky places 

 and open woods: Lab.— Vt.—S.D.—Wyo.— Alaska. Boreal— MonL Je-Au. 



3. H. boreale Nutt. Stem 3-7 dm. high, strigose especially above; leaflets 

 oblong or lanceolate, rounded to acute at the apex, 1.5-3 cm. long, glabrous 

 above, sparmgly pubescent or glabrate beneath; racemes lax; calj'x-tube 2 mm. 

 long; teeth triangular, 1-1.5 mm. long; corolla violet or reddish purple to nearly 

 white; loment finely strigose; internodes 2^, 6-8 mm. long, 5-6 mm. wide. 

 Banks and thickets: Sask.— S.D.— Wyo.— Mack. Boreal— MonL Jl-Au. 



4. H. lancifolium Rydb. Stem 5 dm. high or more, sparingly strigose; 

 leaflets 13-21, lanceolate, acute, about 3 cm. long, 8 mm. wide, shghtly strigose 



calyx 



mm, long, the upper shorter; corolla aboat 15 mm. long, rose-purple; loment 

 somewhat strigose; internodes 2-4, broadly oval, 12-15 mm. long, 8 mm. wide. 

 Mountain woods: Mont.— Alta. MonL Jl. 



^ii^o ™/^^^a*^^ Greene. Stem 6-10 dm. high, minutely strigose; leaf- 

 lets 11-23, from oblong to oval or ovate, obtuse to emarginate, 1-3 cm. long, 

 minutely appressed-pubescent on both sides or glabrate above; racemes rather 

 short; calyx-tube 3 mm. long; upper teeth triangular, 1 mm. long, the lowest 

 lanceolate, 2 mm. long; coroUa rose-purple; loment strigose; internodes 2-5, 

 «-lo mm. long, 6-8 mm, wide. H. inntahense A. Nels. Draws and copses: 

 Wyo.— Colo. MonL Je-Jl. 



7 1^ ^r ^^^^®^^ii Richards. Stem 2-4 dm. high, strigose above; leaflets 

 7 15, elliptic, 1-2.5 cm. long, finely grayish strigose beneath, glabrate above; 

 raceme short; calyx-tube 3 mm. long; teeth 4r-5 mm. long; corolla 18-20 mm. 

 long, rose-purple; loments minutely strigose; internodes 5-7 mm. long, about 5 

 mm. wide. Meadows: N. W. Terr.— Alta.— Yukon. BorealSubarcL Je. 



n-^;- ^' utahense Rydb. Stem 4-6 dm. high, finely strigose; leaflets 11-17, 

 elliptic, oval, or oblong, usually rounded at both ends, 1-3 cm. long, glabrous 

 above, finely cinereous-strigose beneath; calyx-tube nearly 3 mm. long; teeth 

 5 mm. long, attenuate; corolla rose-purple, 15-18 mm. long; loments minutely 

 strigose; internodes 6-8 mm. long, 5-6 mm. wide. Hills among bushes: Utah- 

 Ida. SuhmonL — MonL My-Jl. 



8. H. pabulare A, Nels. Stems 4-7 dm. high, finely strigose; leaflets 9-15, 

 oblong or elliptic, 1-2 cm. long, glabrous above, cinereous-strigose beneath; 

 calyx-tube about 2 mm. long; teeth 3-4 mm. long; loments minutely puberulent; 

 internodes 5-7 mm. long, 5-6 mm. ^\nde. Copses, canons, and among sage-brush: 

 Mont.— N.M.— Utah. SuhmonL My-Jl. 



9. H. camosulum Greene. Stems flexuose, 2-4 dm. high; leaflets 9-11, 

 pale green, thick, linear-oblong to elliptic, 6-15 mm, long, glabrous above, ciner- 

 eous-strigose beneath; raceme lax; calyx-tube 2 mm. long; teeth 2-3 mm, long; 

 loments minutely strigose; internodes 7-8 mm. long, 5-6 mm. wide. Dry hills: 

 Colo.— Utah— N.M, SuhmonL Je-Jl. 



1 ^^\\ cinerascens Rydb, Stems 3-5 dm. high, strigose-canescent or 

 glabrate below; leaflet^ 9-15, oblong or elliptic, 1-2 cm. long, silvery canescent- 

 stngose on both sides; calyx-tube about 3 mm. long; teeth 5 mm. long; corolla 

 readish-purple, about 15 mm. long; loment strigose; internodes 3-4, 6-8 mm. 

 long, about 6 mm, -^ide. H. canesceiis Nutt., not L. Dry hills: Sask.— N.D.— 

 Wyo.— Utah— Ida.--Alta. SuhmonL Je-Jl 



40 



Sand-foin. 



Herbs or undershruba. Leaves odd-pinnate, without stipels. Flowers 

 pertect,m spikes or racemes. Calyx-tube campanulate; teeth subulate, sub- 

 equal, the lower smaller. Banner obcordate or obovate, sessile; wings shorter; 



