PLATYSTEMON AND ITS ALLIES. 1738 
outer petals obovate, inner much narrower, elliptical, all 
deciduous: stamens not very unequal, all with rather broad 
filaments, at least the outer series emarginate, the anthers 
sessile in a notch formed by the acutely triangular lobes: 
fruit subeylindric, glabrous, about an inch long including 
the stigmas, carpels about 14 to 18, narrow, constricted, 
pale and glaucous, traversed by a strong obtuse midnerve, 
the 7 to 9 joints turgidly though rather minutely subcris- 
tate-rugose on the sides. 
Foothills near Stanford University, Santa Clara Co., 24 
April, 1902, C. F. Baker; distributed under n. 665. Mr. 
Baker’s n. 433, from Crystal Springs Lake in the same 
region, seems in part to represent this, while other speci- 
mens under the same label appear to be P. communis; 
and the like is true of Heller & Brown’s n. 5105 from 
near Windsor, Sonoma Co. The two species must needs 
be held distinct if only on the ground of the great differ- 
ences in the character of the filaments. Both are evidently 
peculiar to the region of San Francisco Bay. 
16. P. QUERCETORUM. A foot high or less, rather slender, 
decumbent, much branched, only sparsely pilose as to the 
narrow-linear obtuse leaves, the peduncles more conspicu- 
ously so; these not longer than the leafy branches: corollas 
cream-color, an inch broad, the petals tapering to a very dis- 
tinct though mot narrow claw, and the whole corolla some- 
what turbinate, persistent, with the stamens except as to the 
earliest flowers: filamentsof the outer series not much, ifany, 
longer than the long,narrow, linear anthers, of oblong-obovate 
outline but sharply notched at summit, the acute lobes short: 
oblong fruit # inch long, including the long filiform stig- 
mas; carpels about 12, rather slender, a delicate green nerve 
traversing the whole dorsal length, but each of the 6 or 7 
joints with an elliptic dark spot on the back, the sides more 
