36 POLYPODIUM CALIFORNICUM.—CALIFORNIAN POLYPODY. 
parent veins as seen when held up to the light. These veins 
are club-shaped, or thickened upwards at the termination, a 
point that does not seem to have attracted the attention of 
describers, though as to the mere frond differences in the 
opacity of the various forms have been commented on. 
Kaulfuss in the work from which we have translated the 
description says it is “similar to Polypodium vulgare,” which is 
our common Eastern form. But this is from the botanist’s stand- 
point. The popular vote will be that it is much handsomer, by 
its more slender lobes and generally graceful fronds. 
If we, as it seems we must, combine P. zxéermedium with 
P.. Californicum, it gives a wide geographical range to it on the 
Pacific Coast from the Columbia River southwards. 
EXPLANATION OF THE PLATE.—1I. An average sized plant. 2. An enlarged portion of a 
division of the frond showing the veinlets and the sori thereon. 
