SECT. II 



PHANEROGAMIA 



697 



which the sutures of the three carpels can be plainly distinguished. At the base 

 of each carpel a germinal pore is present in the endocarp (Fig. 757), but only the 

 one in relation to which the embryo lies, remains permeable. The endosperm forms 

 a thick layer within the endocarp ; it is rich in fatty substances and produces the 



Fig. 759. — Acorus calamus. Flowering jilant. Single flowers seen from above and from 



'[the side, (i nat. size.) 



COPEA of commerce. The space within the endosperm is partially filled with fluid, 

 the "milk" of the coco-nut, which is possibly of service in germination. The 

 embryo on germination develops a massive absorbent organ which grows into the 

 cavity of the fruit and serves to absorb the reserve materials. Fig. 758 shows the 

 general habit of Coco-nut palms. 



