26 ' — pITTONIA. 
Watson, Bot. Cal. i. 218 in part, not of Presl. ; Z. Californica, 
var. latifolia, Hook. Bot. Mag. t. 4493. ; 
Species of the widest geographical range, being found from 
the eastern base of Mt. Diablo, in Western California, to the 
higher Sierra Nevada, where it is common, thence eastward 
to Wyoming and southward to the borders of Mexico, and 
probably even throughout the Mexican cordillera, unless the 
Z. Mexicana Presl., which Henke appears to have obtained 
between Acapulco and the City of Mexico, be a distinct 
species. The plant of the mountains of Southeastern Arizona, 
which is likely to be found far down in Mexico, has narrower 
leaves, and a much smaller bulb at base of the calyx than in 
the Californian and typical Z. latifolia ; but the leaves are 
thin and bave the many secondary veins which distinguish 
the species. The present plant occupies a phyto-geographical 
region quite distinct from the habitat of Z. Californica, which 
is found only from Santa Cruz southward near the sea ; but 
in the high mountains of the eastern part of Santa Barbara 
County Mr. Spence collected Z. latifolia, which is otherwise 
unknown to us from the southern part of this State. A pe- 
euliar plant, growing nearly prostrate in broad patches, almost 
glabrous, with lanceolate, thin leaves scarcely veiny, which E 
found on the remote island of San Miguel, I refer here as a 
mere form ; but it may be distinct. Its small flowers were 
only beginning to expand at the time of my leaving the island, 
in the middle of September. 
2. Z.TOMENTELLA. Smaller than the last, grayish through- 
out, even to the ealyx and capsules, with a short, rough, some- 
what tomentose pubescence : leaves thick, ovate to lanceolate, 
aeute, entire or toothed : secondary veins distinct, but in two 
or three pairs only : petals only half as long as the narrow 
calyx-tube which is gradually widened from the globose base : 
stamens little exserted : the tomentose capsules sessile : seeds 
almost pyriform : (clavate-oblong in all other species). 
We have but two sheets of specimens of this: one ticketed 
“ Yosemite," the other without any mark to indicate the deri- 
