Pi^ornhn. LEGUMINOBiE. 139 



Tho typical form is frequent in Washington Territory, Oregon, and Idaho, hut seems not to have 

 been found in California. The variety is common in the Sierra Nevada from the Yosemite to 

 Siena Co., Lcmmon. 



+- +- Pubescen-ce somewhat tnmentose and ifwre or less spreading : pod very short, the 

 bodi/ scarcely exceeding the calyx. 



24. H. tomentosa, Hook. Sz, Am. Very pubescent : the stem covered with 

 spreading liairs, weak and llexuoius, prostrate or ascending, a foot long or more : leaf- 

 lets f) to 7, cuncatn-oblong to obovato, acute, 3 to G lines long : umbels on short 

 bractoolato peduncles, or the uppermost sessile : llowors 3 or 4 lines long : cnlyx 

 half as long or more, very villous; the teeth lax, liliform, as long as tho tube. — 

 Bot. Beechey, 137; Torr. <fe Gray, Fl. i. 324. Syrmatium tomentosum, Yogel in 

 Linnrea, x. 591. 



In dry places near the coast, from San Francisco to Monterey. 



25. H. Heermanni, iHirand & Hilgard. Less densely pubescent : the stem 

 nearly glabrous, much branched and spreading : leaflets smaller, 2 to 4 lines long : 

 umbels on short peduncles or often sessile : (lowers smaller, 2 or 3 lines long : calyx 

 loss villous, lialf as long; the liliform teeth about o(iualling tho tube. — Paoif. R. 

 Kep. V. G, t, 4. 



Sand-hills near San Francisco (Fitch) and southward to San Diego. 



9. PSORALEA, binn. 



Calyx-lobes nearly equal, or the lower one larger ; the two upper often connate. 

 Keel broad and obtuse above, united with the \vings. Stamens diadelphous or 

 sometimes monadelphous : anthers uniform. Pod ovate, indehiscent, 1 -seeded, 

 thick and often wrinkled, sessile. — Perennial herbs (our species), punctate with 

 dark glandular dots; leaves digitate or pinnate, mostly 3 - 5-f()liolate, the leaflets 

 entire ; stipules not adnate to the petiole ; flowers white or purplish, in axillary 

 pedunculate spikes or racemes, with mostly membranaceous and deciduous bracts. 



A genus of about 100 .species, found in all temperate and tropical regions, but most numerously 

 in North America and Southern Africa. Of the 30 North American species, most are confined to 

 the eastern and southern portions of the United States. 



» Leaves pinnaiely ?t-folio[.atc. 

 "♦- Stemi^ prostrate, creeping: leaves Inrge, orbicular. 



1. P. orbicularis, Lindl. Finely pubescent, tho inflorescence villous ; hairs on 

 the calyx mixed with short pedicellate glands : petioles one half to a foot long ; the 

 leaflets 2 to 4 inches in diameter, somewhat cuneate at base : peduncles equalling or 

 exceeding the leaves (1 to 3 feet high), bearing a close villous spike of large flowers ; 

 bracts large, deciduous : calyx 5 to 9 lines long, cleft nearly to the base ; the lower 

 tooth much tho longe.st and about equalling tho purplish corolla : standard oblong, 

 exceeding tho narrow wings and keel : stamens diadel]>lious : pods ovate, acute, 

 compressed, 3 lines long. — Bot. Reg. t. 1971 ; Torr. in Dot. Wilkes Exp. 269. 



Usually in moist places, from Plumas Co. {Mrs. Anics) and Bolinas Bay {Kellogg) to San Diego 

 Co., Palmer. 



-«- +- Stems erect. 



2. P. Strobilina, ITook. <^ Am. Two or three feet high, more or less villous 

 and pubescent throughout ; the stem, peduncles, and petioles glandular : petioles 3 

 or 4 inches long ; leaflets rhombic-ovate, softly pubescent beneath, more glabrous 

 above, about 2 inches long ; stipules large, membranaceous, acuminate : peduncles 

 shorter than the leaves : flowers in short oblong spikes ; bracts very large, decidu- 

 ous : calyx half an inch long or more ; lower tooth much the longe.st and at least 



