PEA FAMILY 
99 
4. L. pachylobus Greene. Plant 1 to 3 dm. high, stout; racemes of 2 to 
4 whorls; flowers few, 6 to 8 mm. long; petals blue, banner suborbicular, 
6 to 8 mm. wide, with a white 
center; pods especially large, 
25 to 30 mm. long, 6 to 8 mm. 
wide.—Grassy hills. 
5. L. bicolor Lindl. var. 
microphyllus C. P. Smith. 
Plant 1 to 4 dm. tall; flowers 
4 to 12 mm. long; keel cili- 
ate; ovules 5 to 8; banner 
elliptic to orbicular-obovate; 
pods 15 to 20 mm. long, 3 to 
5 mm. wide.—Low hills and 
valleys. 
6. L. micranthus Dougl. 
Plants 1 to 4 dm. tall; leaves 
glabrous or sparsely hairy 
above; racemes 1 to 8 cm. 
long, the whorls 2 to 7; 
flowers 5 to 8 mm. long; 
petals blue and white; ban¬ 
ner cuneate or spatulate, the 
center turning violet, the 
sides scarcely reflexing : keel 
short and broad; pods 25 to 
30 mm. long; seeds oblong, 
th'ck.—Commonly abundant. 
7. L. hirsutissimus Benth. 
Plants 2 to 6 dm. high, hir¬ 
sute with nettle-like stiff 
hairs; racemes 10 to 25 cm. 
long with scattered flowers; 
flowers 13 to 15 mm. long, 
spreading; upper calyx-lip 
cleft, lower entire or tridentate; petals violet or lilac; banner sub- 
orbicular; keel stout, straight; pods 25 to 35 mm. long, very hirsute.— 
San Mateo Co. to S. Cal. 
8. L. truncatus. Nutt. Plants 3 to 6 dm. high, branched; leaves many, 
glabrate, the petioles flattened; racemes 6 to 15 cm. long, lax and few- 
flowered; flowers 10 to 12 mm. long, spreading or drooping after an- 
thesis; bracts usually persistent ; upper lip of calyx bifid, lower entire 
or tridentate; petals violet or paler purple; pods spreading, about 3 cm. 
long, villous.—Monterey to S. Cal. 
9. L. sparsiflorus Benth. Plants 2 to 4 dm. high, slender; leaves 
hairy or glabrate above; racemes 8 to 20 cm. long; flowers 8 to 13 mm. 
long, spreading in anthesis; bracts villous, deciduous; petals bright blue 
or purplish, the banner with a yellow spot; keel curved; pods ascending, 
12 to 18 mm. long.—S. Cal. 
Fig. 3. Lupinus succulentus Dougl.; a, fl. 
branchlet xM ; b, upper calyx-lip ; c, lower 
calyx-lip; d, banner; e, wing; f, keel. xl. 
