775 
Campbell .— The Embryo-sac of Pandanus . 
of the ovarian cavity near its base. The placenta and the base of the 
funiculus bear closely placed glandular hairs (Text-fig. I, C, d). These 
hairs are probably concerned with the conduction of the pollen-tube to the 
micropyle. On the inner side of the ovule the outer integument is com¬ 
pletely fused with the funiculus. 
The Ovule. 
The youngest ovules that were secured were from P. affinis. Text- 
fig. i, A, shows a median section through the base of a young carpel of this 
Text-fig. i. a. Section through the base of a young carpel of Pandanus affinis, Kurz, 
showing the single anatropous ovule, x about 35. B. The ovule more highly magnified. The 
sporogenous cell is shaded, x 235. in 1 , in 2 , the integuments. C-E. Older ovules of P. Arto - 
carpus, Griff., showing the young embryo-sac. The embryo-sac shown in E contained fourteen 
nuclei, x about 35; h , secretory hairs upon the funiculus. F. An ovule of P. coronatus about 
ready for fertilization, x about 35. There were two ‘ polar ’ nuclei in process of fusion. 
species. The ovule almost completely fills the ovarian cavity, and at this 
stage is a good deal flattened and the integuments do not extend much 
beyond the apex of the nucellus. The ovule is shown more enlarged at B. 
Text-figs. 1, c, D, represent similar sections of older ovules of P. Arto - 
carpus. In these older stages the nucellus becomes more elongated and 
the terminal portion of the integuments also becomes lengthened. 
