408 
In my studies of several species of the Polypodiacez I observed 
‘a prothallium of Adtantum cuneatum which showed two well devel- 
oped cotyledons of apparently about the same age, and growing 
parallel to each other. Examining the specimen carefully it was 
noted that both cotyledons were attached to the under surface of 
the prothallium side by side, and that by the base of each was a 
young leaf the tip of which was rolled up in circinate fashion. 
Two well developed roots also issued side by side a little to the 
rear of the cotyledons. The roots were long and well fastened to 
the substratum. These parts gave every appearance of there 
_being two perfectly developed embryos that were in fact two 
independent plants from the same prothallium. A sketch was 
made of the prothallium with its two plants. It occurred to me 
that possibly this apparent development of two perfect embryos 
side by side on a single prothallium might be some abnormal 
condition of a single embryo in which the stem and root, or possi- 
bly the stem and root segment, had forked at a very early period 
in its developement. To be certain what the real condition of 
things was, the bulk of the cotyledons and roots was cut away and 
the prothallium with the young plants attached was cut in serial 
sections and mounted for examination. The sections were cut 
parallel with the axis of the prothallium and thus parallel with 
the embryo. From the point of passing in at one embryo to 
the issuing from the other all the sections were saved and 
arranged serially. A study showed two separate and perfect 
embryos, and they were so far advanced as to be able to exist 
independent of the prothallium. 
BoTANICAL DEPARTMENT, 
CORNELL UNIVERSITY. 
Botanical Notes. 
Blephilia ciliata (L.) Raf., in Western New York.—On July 2, 
1893, I found a small tract of plants of Blephilia ciliata (L.) Raf., 
near Canandaigua, N.Y. The specimens grew in a low, rocky 
pasture adjoining a swamp. The plants were fine, being in full — 
bloom at that time. * 
_ As nearly as I have been able to ascertain, Blephilia ciliata is 
