38 COMPARATIVE EMBRYOLOGY OF THE RUBIACEAE 
tana, in which a completely developed embryo-sac is frequently to 
be found in the chalazal part of the ovule, or even in the funicle. 
Text figs. 1 and 2 illustrate two such instances. In fg. z two 
Fic. t, Ovule with a second embryo-sac FiG, 2. Ovule with three embryo-sacs, 
lying in the funicle. two in the funicle and one in the usual 
Pm The dotted line indicates the fre- 
0-Sac 
Sa! 
Y P g positi 1 
embryo-sacs are seen; one in the normal position, 7. ¢., in the 
micropylar canal, and one lying parallel to it, but in the funicle. 
Both are completely developed. In text fig. 2 three embryo- 
sacs may be seen ; the one normal in position, and the two others 
lying against eh other, in the funicle, and considerably dis- 
torted. The egg poles of these two embryo-sacs are placed 
against the pericarp ; that is to say, the embryo-sacs have grown 
to the surface of the ovule. In text fig. 3 the egg apparatus 
and polar nuclei of one of these abnormally placed embryo-sacs 
may be seen to be quite normal except for a small amount of dis- 
tortion. Whether the egg of such abnormally placed embryo- 
sacs is ever fertilized is doubtful, and no case has been observed. 
This plant has flowers which show a peculiar form of dimorphism 
caused by the abortion of the ovules in a large percentage of cases. 
