332 



MORPHOLOGY, 



ing from the endosperm into the embryo is stored in the cotyle- 



In other plants the endosperm 



dons for use during germination 



Fig. ^07. Fig. 5o3. 



Section of one end of ovule uf trillium, sliowing Embryo e n - 



young embryo in endosperm. larged. 



is not all consumed by the time the seed is mature. Examples of 

 "ihis kind are found in the buttercup family, the violet, lily, palm, 



I'ig 39P- 

 Seed of vi()lct, external \'ic\v, and 

 section. The section shows the embryo 

 lying in the endosperm. 



Fig. 400. 

 Section of fruit of pepper (Piper 

 nigrum), showing small embryo Iving 

 in a small quantity of wliitish endo- 

 sperm at one end, the perisperm oc- 

 cupying tlie larger part of the interior, 

 surrounded by pericarp. 



jack-in-the-]Hil[»it, etc. Here the remaining endosperm in the 

 seed is used as food by the embryo during germination. 



663. Outer parts of the seed. — W'liile tlie embryo is fi>rming 



