NOVITATES OCCIDENTALES. 99 
latter nearly equalling the leaves: bracts lanceolate, 3 lines 
long: corolla about 6 lines long, the calyx-segments shorter, 
four of them resting against the banner, the fifth and sepa- 
rated one rather broader, linear-lanceolate: banner dull- 
white changing to the lurid-purple or deep-violet of the 
Wings and keel. 
Found only on the summit of Mt. Diablo, and unadvisedly 
referred to P. Californica in the Bay Region Manual, 
Psoralea Douglasii. Habit and size of P. macrostachya, 
but more slender, nearly glabrous, the stem commonly 
conspicuously punctate: cylindrical racemes on long slender 
peduncles; bracts deltoid, caducous; rachis not hirsute: 
segments of the calyx not equalling the violet corollas. 
This altogether distinct species has latterly been treated 
as a mere form of P. macrostachya, and it was figured by 
Lindley (Bot. Reg. xxi. t. 1769) as the supposed type of that 
species. Hooker, recognizing it as distinct, erred in another 
direction by referring it to his own P. strobilina (Bot. Beech. 
332). It must needs be admitted as a very good species. 
True P. macrostachya is easily recognized by its abundant 
pubescence, narrower and strongly mucronate leaflets, very 
hirsute rachis, and by its calyx-segments quite exceeding 
the corolla. 
Streptanthus versicolor. Erect, slender, a foot high or 
more, sparingly branching; lower part of stem, and also the 
middle cauline leaves hispid, the leaves more especially so 
beneath: lowest leaves unknown; cauline almost linear, 
sessile and auriculate-clasping, remotely serrate-toothed: 
slender raceme very lax, unilateral: sepals all ovate, sub- 
equal, carinate: petals at first white, changing to lilac- 
purple, very unequal, the upper pair with ample lamina and 
long-exserted claw, the lower pair not half as large, and 
their claws scarcely exserted: upper pair of filaments united 
