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22h 
Leguminaceae 
L. micranthus Doug]. 
BB. Lower lip of the calyx slightly 3-cleft; pedicels about 4 mm. long. U 
L. bicolor Lindl. 
B. Lower lip of the calyx entire; pedicels 2 mm. or less long. W 
BBB. Lower lip of the calyx 3-parted; pedicels 2 mm. or less long. U 
L. trifidus Torr. 
GROUP?Z 
A. Plants less than 3 dm. high. 
B. Leaflets 3—4.2 cm. long, not mucronulate; keel of corolla not ciliate. W. C. E. 
L. subalpinus P. & R. 
(L. arcticus.) 
BB. Leaflets either shorter or else mucronulate; keel of corolla distinctly ciliate. 
C. Petal 8—10 mm. long. 
D. Leaflets 8—12, 1.2—2.5 cm. long, not mucronulate; flowers in loose ra- 
cemes. C. L. voleanicus Gr. 
DD. Leaflets 6—10, 2.55 cm. long, mucronulate; flowers in dense racemes. 
L. mucronulatus How. 
ES 
L. saxosus How. 
L. propinguus Gr. 
CC Pera: 15 mm. long 
AA. Plants more than 3 dm. high. 
E. Plant shrubby at base. U. 
EE. Plants not shrubby at base. 
F. Calyx spurred or saccate at base. 
G. Leaflets oblanceolate. 
H. Leaflets hairy above. 
I. Stem villous with spreading or retrorse hairs. E. 
L. retrorsus Hend. 
II. Stem minutely pubescent with appressed hairs. 
tanus. ) L. laxiflorus Doug]. 
HH. Leaflets glabrous above or very nearly so. 
Eg 
J. Leaflets 4—6; calyx spurred at base. 
L. stenophyllus Rydb. 
Ei 
JJ. Leaflets 7—10; calyx gibbous or saccate at base. 
L. pseudoparviflorus Rydb. 
E. (L. laxiflorus mon- 
(L. laxtspica- 
ius. ) 
GG. Leaflets linear to lanceolate. 
K. Calyx saccate or gibbous at base. E. 
L. argenteus Pursh 
E. 
KK. Calyx with spur as long as its tube. 
L. multitinctus Nels. 
FF. Calyx symmetric at base or nearly so. 
L. None of the petioles more than twice as long as the leaflets. 
M. Keel of the corolla ciliate. E. 
L, parviflorus Nutt. 
MM. Keel of the corolla naked. 
N. Leaflets 1O—16. (See Q.) 
W. 
NN. Leaflets 6—9. 
O. Lower calyx-lip entire. 
L. latifolius Ash. 
W. 
OO. Lower calyx-lip 3-tcothed. 
L. nootkatensis Donn 
LL. Lower petioles more than twice as long as the leaflets. 
P. Keel of the corolla naked. 

