(371) 
various degrees of specialization may be observed culmi- 
nating in the fruit of Cucurbita Pepo. In the members of 
these tribes we may note varying degrees of development of 
opment of ovary ; /, section of ovary a little later than KX. Z to O, Homor- 
dica, L, apex of shoot showing two young pistillate flowers, +; 7, N,y 
aera flowers; O, section of ovary. /, apex of shoot and young pistil 
late flowers of Trichosanthes. 
the spongy tissue which fills the locules of the ovary and 
invests the seeds completely in certain genera (Cucurbita, 
Citrullus). While the early stages in the ontogeny of the 
ovary are very similar so far as observed throughout this 
