428 The Botanical Gazette. | October. 
embryo sac from apex to base. The antipodal cells and egg apparatus 
are as usual, but the two remaining nuclei do not fuse until fertiliza- 
ent: first, before 
has formed the 
t 
at the time of fertilization the carpels are long since dried, the 
has been fully formed and the ovules have jus 
velopment... : 
Nawaschin concluded that there must be an intermediate ee 
tween the chlazogamous and porogamus angiosperms and has ¢ eo a 
ered it in the Ulmaceae: At the time f pollination the ovules Fr 
almost ripe; the pollen tube passes through the short atyle and 
scends the funiculus. half the [ength of the ovule and thet di 
itself to'the apex’ of the nucellus which it reaches by penetrating 
fertilizatio® 
. loc as an i 
placenta containing an ovule limited to the embryo 
corpuseula); = =e : 
