Campbell.—Studies on the Araceae. 9 
spathe. While I was unable to procure a complete series of 
stages, still a considerable number were secured, especially 
of the later stages which were missed in Dieffenbachia. 
The solitary carpels are tipped with the very large slightly 
funnel-shaped stigma, and the large solitary ovule arises from 
the base of the ovary. A section of the stigma shows it to 
be composed of very closely set elongated papillae, which 
become shorter toward the centre of the funnel. There is 
a short but evident canal extending to the ovarian cavity, 
but it is completely filled with the stigmatic papillae. 
The ovule, like that of Dieffenbachia , is very massive, but 
the integuments are not so largely developed (Figs. 22, 27). 
To judge from the very small number of early stages obtained, 
the general development is much like that of Dieffenbachia . 
All the nuclei are extraordinarily large, and the plant would 
probably prove a good one for cytological study. The em¬ 
bryo-sac, as in' Dieffenbachia , soon destroys the lateral tissue 
of the nucellus, but leaves the apical part as a cap at the 
top of the embryo-sac. At the time of fertilization the free 
portion of the outer integument is very slightly developed, 
and the opening of the micropyle is formed by the inner 
integument alone. After the endosperm begins to develop, 
the outer integument grows until its margin is on a level with 
that of the inner one, but does not extend beyond it (Fig. 27). 
On the side next the funiculus, the outer integument is scarcely 
developed at all, and it is difficult to say just how much of 
the base of the ovule is to be regarded as nucellus, and how 
much as funiculus. 
Most of the specimens examined had already begun to 
form the endosperm, and no satisfactory preparations of the 
egg-apparatus or antipodal cells were secured. One puzzling 
case was encountered, shown in Figs. 22-24. The embryo- 
sac here was of full size, and at the base was a very sharply 
defined mass of densely granular cytoplasm containing two 
large nuclei, which were apparently in the prophases of 
division. At the apex of the sac was a rounded mass of 
protoplasm with a single nucleus, apparently the egg, and in 
