294 



LEGTJMINO&flE. 



oblong-elliptical, mucronulate at the retuse apex, shortly petioled, 

 7 to 12 lines long; rachis pubescent and with prickle-like glands 

 scattered among the sessile ones, often becoming glabrous late in 

 the season; stipules and bracts lanceolate, deciduous; racemes 2 to 

 4 in. long; calyx 1^ lines long, its teeth silky, lanceolate, twice the 

 length of the tube; corolla twice as long as the calyx; pod 1\ lines 

 long, with many low circular glands which are depressed or somewhat 

 excavated in the center. 



Wooded canons: Pope Valley, Bolander, and Calistoga to Mt. 

 Tamalpais and southward near the coast. May. 



Ours perennial herbs. Herbage heavj'-scented, punctate with dark 

 dots. Leaves 3-foliolate; stipules free from the petiole. Flowers 

 purple or whitish in spikes or racemes. Calyx 5-cleft, its lobes 

 nearly equal. Keel broad, obtuse, joined to the wings. Stamens 

 monadelphous or diadelphous; anthers uniform. Pod seldom exceed- 

 ing the calyx, 1-seeded, indehiscent. (Greek psoraleos, scurfy or 

 rough, the glands wart-like in some species.) 



Two shrubby cultivated species of Psoralea are said to have been 

 found wild in the Bay Region: P. glandulosa L. has pinnately 

 3-foliolate leaves with ovate-lanceolate leaflets 2 in. long, the petioles 

 1 to 1£ in. long; flowers bluish, more or less verticillate, in racemes. 

 P. bracteata L. (P. fruticosa Kellogg) has palmately trifoliolate 

 leaves; leaflets £ to f in. long, oblong-obovate, mucronate; petioles 

 1 to 2 lines long; spikes short, dense, terminal, not peduncled. — 

 "Streams of Mt. Tamalpais, F. P. McLean, 1873." 



Leaves pinnately 3-foliolate. 

 Stem prostrate; leaves and peduncles erect; flowers racemose; stamens 



diadelphous 1. P. orbicularis. 



Erect plants. 

 Flowers in spikes, purple. 

 Peduncles shorter than the leaves; stamens monadelphous 



2. P. strobilina. 



Peduncles much surpassing the leaves; tenth stamen nearly free. 

 More or less pubescent; calyx-teeth exceeding the petals 



3. P. macrostachya. 



Nearly glabrous but for the elevated roundish glands on the stem; 



1. P. orbicularis Lindl. Herbage finely pubescent, the inflo- 

 rescence villous; stems prostrate, creeping and rooting, the long- 

 stalked leaves and racemes erect; leaflets 2£ to 3 in. long, the lateral 

 pair obovate. the middle one more nearly orbicular; petioles 6 to 15 

 in. long; spike varying from 3 or 4 in. to 10 in. long, borne on 

 peduncles which equal or exceed the leaves; flowers 6 lines long; 

 calyx with stipitate glands scattered among the hairs, cleft almost to 

 the base, the lowest tooth as long as the purplish corolla; pod ovate, 

 acute, 3 lines long. 



Grassy vales or meadows: near the coast from Southern California 



7. PSORALEA L. 



