80 BOTANICAL GAZETTE [JANUARY 
ceived or convincing) that the leaves of plants admit water. He therefore justifies 
the practice of spraying the foliage. The most positive evidence that leaves 
admit water, as well as an indication of the magnitudes involved, is to be found 
in the cuticular evaporation. This does not seem to have occurred to HENs- 
Low, perhaps because he does not conceive of absorption and evaporation as 
a physical process.—C. R. B. 
Imbedded antheridia in Dryopteris and Nephrodium.—In cultures of these 
two ferns to obtain apogamy, Miss Biack4® discovered “imbedded antheridia” 
in prothallia of both species, that is, such antheridia as occur in the eusporangiate 
forms. Although apogamy was not induced, these antheridia are of sufficient 
interest to justify the cultures. The association of the two kinds of antheridia 
in the same form, dependent upon conditions, is well known in Equisetum, but it 
does not seem to have been recorded before for ferns.—J. M. C. 
LACK, CAROLINE A., The development of the imbedded antheridium in Dryop- 
teris faaee ee Maxon and “Nephrodium molle.” Bull. Torr. Bot. Club 
36:557-571. pls. 26-28. 
