98 
LEGUMINOSAE 
Keel non-ciliate, or ciliate on upper margins near apex only. 
Pedicels 3 to 8 mm. long; flowers 8 to 16 mm. long; verticils 
few to several; upper calyx-lip cleft, lower bi- or tri- 
dentate; seeds 2 to 3 mm. long. 3. L. nanus. 
Pedicels 1 to 3 mm. long; upper calyx-lip cleft, lower tridentate. 
Banner neither cuneate nor spatulate; keel slender. 
Pods 6 to 9 mm. wide; seeds 4 to 5 mm. long. 
4. L. pachylobus. 
Pods 3 to 5 mm. wide; seeds 2 to 3 mm. long. 
5. L. bicolor. 
Banner cuneate or spatulate; keels short and broad ; seeds 
3 mm. long.6. L. micranthus. 
Flowers not verticillate-whorled; keel ciliate on lower margins near 
claws. 
Racemes longer than peduncles; upper lip of calyx cleft, lower entire 
or tridentate, but see no. 9. 
Longest leaflets 15 to 25 mm. wide; plant with stinging hairs. 
7. L. hirsutissimus. 
Largest leaflets 2 to 15 mm. wide. 
Keel stout, with blunt acumen, densely ciliate on upper 
edge .8. L. truncatus. 
Keel with slender acute acumen.9. L. sparsiflorus. 
Racemes usually shorter than peduncles ; upper calyx-lip bifid, lower 
entire .10. L. stiversii. 
Plants perennial; pedicels slender, 3 to 12 mm. long; floral bracts usually 
early deciduous. 
Keel not ciliate. 
Shrubs or sub-shrubs ; upper calyx-lip cleft, lower entire. 
Tall shrubs; leaves all short-petioled.13. L. chamissonis. 
Low sub-shrubs with long petioles at flowering time. 
14. L. albifrons. 
Herbaceous; leaves silky-pubescent above; calyx-lips notched or 
entire, 6 to 10 mm. long.15. L. formosus. 
Keel ciliate on upper margins. 
Keel ciliate from the claws to about the middle; upper calyx-lip 
notched, about 4 mm. long, lower entire, about 6 mm. long ; 
herb ...11. L. latifolius. 
Keel ciliate from near apex to the middle ; upper calyx-lip notched 
or retuse, 6 to 8 mm. long, lower entire; tall shrub. 
12. L. arboreus. 
1. L. densiflorus Benth. Plant 2 to 5 dm. high, simple or branched; 
leaves long-petioled, glabrous above; racemes 15 to 25 cm. long, the 
whorls 5 to 12; flowers 14 to 18 mm. long, spreading during and after 
anthesis; upper calyx-lip short, scarious, lower lip much longer, green; 
petals lilac or rose; banner elliptic; keel ciliate on upper edges; pods 
ovate-oblong.—San Francisco Bay Region. 
2. L. succulentus Dough Fig. 3. Plant 2 to 6 dm. high, stout, 
branched; leaves long-petioled, glabrous above; racemes 6 to 30 cm. long; 
flowers 12 to 17 mm. long, approximate in 4 to 8 whorls, spreading in 
anthesis, ascending later; petals deep blue to almost white, the banner 
with yellow center turning violet; keel somewhat curved; pods about 5 
cm. long,—Butte Co. to S. Cal. 
3. L. nanus Dough Plant erect, 2 to 6 dm. high, simple or branched; 
leaves long-petioled; racemes 6 to 20 cm. long; verticils well separated; 
bracts deciduous; petals rich blue, rarely pink, the banner with white or 
yellow, center changing to violet; pods appressed-pubescent, 20 to 35 mm. 
long; ovules usually 4 to 8; seeds 2 to 3 mm. long.—Coast Ranges; 
Sierra foothills. 
