ANGlOSPERMjfi. 419 



pistils, and collectively the Gytmcium) normally develop 

 upon the uppermost portion of the flower-axis, and within 

 the whorl of stamens. They consist of one or more infolded, 

 ovuliferous phyllomes (carpophylla) whose margins are 

 united so as to form separate, or more or less united cavi- 

 ties (ovaries). The apical portions of the carpophylla are 

 usually extended, terminating in a mass of loose parenchy- 

 matous tissue, the stigma. The ovules arise as outgrowths 

 (trichomes, in the broader sense of the term) upon some 

 portion of the interior surface of the ovary ; they most fre- 

 quently develop upon the margins of the carpophylla, 

 although they are by no means confined to them. In some 

 cases there is but a single ovule in 

 each ovary, in others they range 

 from a few to several hundred. In 



many cases, especially when the ^w* 

 ovules are numerous, the ovulifer- 

 ous portion of the ovary is devel- -A B 



oped into a thickened mass of tis- Fig. 305. very young ovules of 

 sues, the placenta, which projects 

 more or less into the ovary cavity. 

 530,-Each ovule is at first a 



homogeneous maSS of parenchyma- aec 

 ,* % velo 



nclinc) is just beginning to de 



, elop as a ring, se ; in B there are 



toilS tiSSUe, Constituting the body two rings, the upper being the ru- 



/ ii j i \ < iu i climentary secundine, the lower 



(Or SO-Called nucleus) Of the OVUle ; the prlmine. X 140. After Du- 



a little later a circular ridge arises chartre - 

 upon the ovule body ; this grows upward, and forms an in- 

 tegument ; a second integument generally forms in exactly 

 the same way outside of the first (Fig. 305, A and B}. From 

 their position when fully formed, these coats have received 

 the names primine and secundine, the former being applied 

 to the outer, the latter to the inner.* The coats never com- 

 pletely enclose the body of the ovule, there always remaining 

 a small opening (the micropyle) over its apex (m, Fig. 306, 



* These terms were so applied by Mirbel, who was not acquainted 

 with the order of development of the coats. Schleiden applied them 

 in exactly the opposite way, which has led to some confusion. Mir- 

 bel's use of the terms, although not as good as Schleiden's, is the pre- 

 vailing one. 



