1 2 Campbell. — The Development of the Flower and 
very much like the corresponding stage in Zannichellia ; indeed 
the whole development of the flower is very much like that of 
the latter. 
In the long-styled flower, the slender ovular rudiment soon 
shows a broader and somewhat pointed form (Fig. 16). The 
pointed appearance is due to a stronger growth at this place, 
by which the original apex is forced over to one side, this 
being the first indication of the anatropous form of the older 
ovule. In the short-styled flower, the young ovule (Figs. 17, 
19, o) is much blunter from the first, but here also the 
original apex is soon bent over by the excessive growth upon 
the outer side of the young ovule. In both forms of flowers, 
the growth of the carpel is rapid ; it soon grows up beyond the 
top of the ovule, and the margins, which at first are quite 
free, so that the carpel forms an open cup, approach and 
finally meet, the ovary-cavity thus becoming completely 
closed. The carpel is closely appressed to the ovule, and its 
upper part is extended into the tubular style, the final 
development of the latter varying much as we have already 
indicated. The young style is traversed by a narrow open 
canal, but this later becomes entirely closed by the cohesion 
of the cells lining it. In the long-styled flower, the style and 
stigma are perfectly symmetrical ; but in the short-styled one, 
the stronger development of the carpel upon the inner side 
of the young flower persists, so that the stigma is much more 
strongly developed upon this side (Fig. 25). 
As the ovule develops, the much stronger growth on one 
side forces the original apex over until it assumes nearly 
a horizontal position (Figs. 18, 20), and finally it becomes 
perfectly anatropous (Fig. 25). The first integument becomes 
evident at a very early period, and forms a shallow cup- 
shaped structure, more strongly developed on the upper side 
of the ovule (Figs. 18, 20, in.). Not long after this, the 
second (outer) integument is differentiated, but this is fully 
developed only upon the outer free side of the ovule 
(Fig. 21, in 2 ); while upon the inner side, which is in contact 
with the funiculus, it is imperfect. The inner integument is 
