104 
LEGUMINOSAE 
1. L. formosissimus Greene. Stems several from a thick and rather 
soft root, decumbent; herbage green and glabrous; leaflets 5 to 7, obo- 
vate or some deltoid, 6 to 16 mm. long; umbels 4 to 6-flowered, 3-folio- 
late-bracted, on peduncles 2.4 to 4.8 cm. long; flowers exceeding 1.2 cm. ; 
banner and keel yellow; wings purplish or white; pod straight, 3 cm. 
long, about 2 mm. broad.—Seaboard species, in wet grounds. 
2. L. micranthus Benth. Simple or diffuse, 7.2 to -14.4 cm. high; 
leaflets 3 to 5, mostly 4, with one leaflet terminal and two on one side of 
the rachis and one on the other obovate to oblong, 4 to 10 mm. long; 
corolla minute, pale salmon color, turning red ; pod linear, 14 to 20 mm. 
long.—Grassy hills, Coast Ranges. 
3. L. americanus (Nutt.) Bisch. Spanish Clover. Stems more or 
less branching, erect or diffuse, 2 to 4 dm. high; leaflets 1 to mostly 3, 
ovate to oblong, 6 to 24 mm. long or more: corolla whitish or pinkish, 4 
to 6 mm. long; pod narrowly linear about 2.4 cm. long.—Dry hills and 
plains. 
4. L. humistratus Greene. Hill Lotus. Plants commonly forming 
mats 1.2 to 2 dm. broad; herbage soft-hairy; leaflets 4, narrowly oblong 
or cuneate-obovate, 6 to 10 mm. long, the rachis very broad; flowers ses¬ 
sile or nearly so; calyx-teeth much longer than the tube; corolla yellow, 
6 to 8 mm. long; pod oblong, hairy, 2 or 3-seeded.—Sunny clay hillsides. 
5. L. subpinnatus Lag. var. wrangelianus Jepson. Diffusely branched, 
9.6 to 16.8 high; herbage short-pubescent or nearly glabrous; leaves as in 
preceding; flowers distinctly pediceled; corolla bright yellow, 8 to 9 mm. 
long; calyx-teeth as long as tube; pod linear, pubescent, 5 to 7-seeded.— 
Hill country. 
6. L. glaber (Vogel) Greene. Deer-weed. Stems tufted and reed¬ 
like, woody at base, the foliage often sparse; leaflets 4 to 6, mostly 3, 
oblong to linear-oblong, 6 to 12 mm. long; calyx-teeth subulate, as long 
as tube; corolla yellow, turning red, 6 to 8 mm. long.—Dry hills. 
9. PSORALEA L. 
Perennial herbs with heavy-scented dark-dotted herbage. Leaves with 
3 leaflets. Flowers purple or whitish, in spikes or racemes. Pod seldom 
exceeding the calyx, 1-seeded, not splitting open. (Greek psoraleos, 
scurfy or rough, the glands wart-like in some species.) 
Stems prostrate; leaves and peduncles erect; flowers racemose; stamens diadel- 
phous..1. P. orbicularis. 
Stems erect. 
Flowers in spikes, purple; tenth stamen nearly free.2. P. macrostachya. 
Flowers in racemes, greenish-white; stamens monadelphous....3. P. physodes . 
1. P. orbicularis Lindl. Stems prostrate, creeping and root.ng, the 
long-petioled leaves and peduncles erect ; leaflets roundish or obovate, 6 
to 7.2 cm. long; flowers purplish, in racemes; stamens diadelphous.— 
Grassy vales or meadows. 
2. P. macrostachya DC. Leather Root. Plants 1 to 3 m. high, 
branching; leaflets ovate-lanceolate, 3.6 to 7.2 cm. long; peduncles much 
exceeding the leaves; calyx-teeth exceeding the petals; tenth stamen 
nearly free.—Rivers, canon streams and marshes. 
3. P. physodes Dough About 2 dm. high ; leaflets ovate and acute. 
