46 LEGUMINOSE. (PEA FAMILY.) 
8. H. brachycarpa, Benth. Resembling the last; softly villous; pod villoue,. 
24-seeded. 
9. H. glabra, Torr. Very nearly smooth; stems woody at base, 2 to 8 ft. long, 
erect or decumbent; leaflets oblong to linear-oblong, 3 to 6 lines long; umbels numerous,. 
sessile; flowers 3 or 4 lines long; seeds 2. 
10. H. cytisoides, Benth. Resembling the last; peduncles equaling or exceeding 
the leaves, or sometimes very short, usually with a 1~3-foliolate bract at the top; calyx- 
teeth attenuate, mostly recurved. 
ll. H. juncea, Benth. Somewhat shrubby, erect; leaflets obovate to oblong, 2 to- 
4 lines long; umbels on very short peduncles or sessile; flowers about 3 lines long; calyx 
2 lines long or less; teeth short and blunt. 
12. H. tomentosa, Hook & Arn. Very pubescent, weak and flexuose, prostrate or 
ascending, a foot or more long; leaflets 5 to 7, cuneate-oblong to obovate, acute, 3 to 6. 
lines long; umbels on short bracteolate peduncles, or the uppermost sessile; flowers 3 or 4- 
lines long; ¢ alyx half as long or more, very villous. 
13. H. Heermannii, Durand & Hilgard. Less pubescent, much branched and. 
spreading; leaflets smaller; flowers smaller. 
8. PSORALEA, L 
Calyx lobes nearly equal, or the lower one longer; the two upper often connate. Keel’ 
broad and obtuse above, united with the wings. Stamens diadelphous or monadelphous. 
Pod ovate, indehiscent, l-seeded, thick, sessile. Perennial herbs punctate with dark 
glandular dots. Leaves pinnately 3-foliolate. Stipules free. 
* Stems prostrate, creeping; leaves orbicular. 
1. P. orbicularis, Lindl. Petioles 6 to 12 inches long; the leaflets 2 to 4 inches 
azross, slightly cuneate at the base; peduncles equaling or exceeding the leaves, bearing 
a close villous spike of large flowers; the lower tooth of the calyx much the longest and 
about equaling the purplish corolla; stamens diadelphous. 
** Stems erect. 
2, P. strobilina, Hook & Arn. Two or three feet high; petioles 3 or 4 inches 
long; leaflets rombic ovate, softly pubescent beneath, about 2 inches long; stipules large, 
membranaceous; flowers in short oblong spikes, smaller than the last; stamens monadel- 
phous. 
3. P. macrostachya, DC. Three to even twelve feet high; leaflets ovate-lance- 
olate, an inch or two long or more; peduncles much exceeding the leaves; spikes cylin- 
drical, silky villous, the hairs often blackish; the lower tooth of the calyx but little the 
longest, scarcely equaling the purple petals; tenth stamen nearly free. 
4. P, physodes, Dougl. A foot or two high, nearly smooth, slender; leaflets 
