140 LEGUMINOS^E. Psoralen. 



equalling the purple corolla : stamens monadelplious : ovary pubescent. — Bot. 

 Beechey, 332, t. 80 ; Torr. & Gray, Fl. i. 689, excl. var. 



In the hills from Contra Costa County to Santa Cruz. Differing from the next in its greater 

 pubescence, rather larger leaves, larger stipules, short peduncles, and larger bracts and flowers. 



3. P. macrostachya, DC. Three to six (or sometimes 10 or 12) feet high, 

 puberulent or nearly glabrous, rarely somewhat tomentose : petioles shorter ; stipules 

 small, lanceolate ; leaflets ovate-lanceolate, often acutish at base, an inch or two long 

 or more : peduncles much exceeding the leaves: spikes cylindrical, silky-villous, the 

 hairs often blackish ; bracts broad, acuminate, as long as the flowers : calyx 3 or 5 

 lines long; the lower tooth a little longest, scarcely equalling the purple petals: tenth 

 stamen nearly free : pod villous, ovate-oblong, acute, compressed, 3 or 4 lines long. 

 — Prodr. ii. 220 ; Lindl. Bot. Beg. t. 1769; Torr. & Gray, Fl. i. 689. P. strobi- 

 lina, /3., Torr. & Gray, 1. c. 



Through nearly the length of the State : Eag Canon, near Shasta (Brewer), and frequent in the 

 foot-hills of the Sierra Nevada ; Arroyo Seco, Santa Lucia Mts. (Brewer) ; San Felipe Canon, San 

 Diego Co., Palmer. 



4. P. physodes, Dougl. A foot or two high, nearly glabrous, slender : petioles 

 short and slender ; stipules small, lanceolate ; leaflets ovate, mostly acute, about an 

 inch long : peduncles about equalling or sometimes exceeding the leaves : flowers in 

 short close racemes ; bracts small : calyx somewhat villous with usually dark hairs, 

 half as long as the corolla, at length much enlarged and inflated, becoming 4 or 5 

 lines long ; its teeth short, nearly equal : petals half an inch long or less, white or 

 purplish : stamens monadelplious : pod rounded, compressed, 3 lines long. — Hook. 

 Fl. i. 136 ; Torr. & Gray, Fl. i. 304. 



In the Coast Ranges from Monterey northward, extending to Puget Sound. 

 * * Leaves digitately 3-foliolate. 



5. P. lanceolata, Pursh. Erect, a span or two high, glabrous or with a few 

 scattered hairs : petioles short ; stipules linear-lanceolate ; leaflets linear to oblong- 

 obovate, acute, about an inch long : peduncles about equalling the leaves : flowers 

 small (2 or 3 lines long), bluish-white, in short spikes ; bracts small : catyx very 

 small ; its teeth short, obtuse, nearly equal : stamens diadelphous : ovaTy very silky : 

 pod compressed, very glandular, 2 lines in diameter. — Hook. Fl. i. 135, t. 51. 



Frequent in the, interior from Washington Territory to Northern Arizona and eastward to the 

 Saskatchewan and Nebraska. Probably to be found in the northeastern part of the State. 



P. floribunda, Nutt., a similar species, ranges from Texas to "Western Arizona and may enter 

 S. E. California. It is more or less canescent with short white hairs, the peduncles exceeding the 

 leaves, and the flowers on short slender, pedicels ; petioles mostly very short. 



10. AMORPHA, Linn. 



Calyx obconical, nearly equally 5-toothed. Wings and keel wanting : standard 

 erect, folded together. Stamens slightly united at base, exserted : anthers uniform. 

 Pod oblong, exceeding the calyx, in dehiscent, sessile, 1 - 2-seeded. — Shrubs, glan- 

 dular-punctate ; leaves unequally pinnate, the leaflets usually stipellate ; stipules 

 small ; flowers purple or violet, small, in dense clustered terminal spikes. 



Half a dozen species, peculiar to the United States, chiefly southern. 



1. A. California a, Nutt. Three to eight feet high, puberulent, the young 

 leaves silky-pubescent : branches often beset with stout projecting glands : leaflets 5 

 to 7 pairs, oblong-elliptical, obtuse, mucronulate, shortly petiolulate, an inch long : 

 stipules and bracts small, lanceolate, deciduous : spikes 1 to 3, and 2 to 6 inches 

 long : flowers purple, 2-J- lines long : calyx half as long ; the teeth silky, triangular, 

 acute : pod pubescent, lialf-obcordate, 3 lines long. — Torr. & Gray, Fl. i. 306. A. 

 fruticosa, Torr. Bot. Mex. Bound. 53. 



