212 



SCHOOL AND HOME GARDENS 



.Cotyledon 



Hypocotyl 

 Caruncle 



In a grain of corn the lower part of the embryo, 

 located near the hilum, is called the radicle. The plu- 

 mule is the upper part of the embryo, and the single 



cotyledon lies next to the 

 .Endosperm en( }osperm, which constitutes 

 a large part of the grain of 

 corn (see Fig. 116). 



Soak beans, castor beans, 

 corn, and several other kinds 

 of seeds. Examine the seed 

 coats and compare them. Find 

 the embryo in each. If the 

 FIG. 115. Castor Bean with One seeds contain endosperm, lo- 



Half of the Endosperm and One , ,1 ^ ,1 



Cotyledon cfit away cate xt Wlth reference to the 



cotyledons. 



Kinds of seeds. As the seeds mature during summer 

 and fall, the names of the different kinds of seeds may 

 be learned while gathering 

 samples. Place the seeds in 

 envelopes and write the name 

 of each kind on the envelope Cot ^ 

 that contains it. Envelopes 

 that have been used will do ; 

 they may be closed by folding 

 over the open ends. 



Seed board. A convenient device for learning the 

 names of seeds is a seed board, shown in Fig. 117. 



The dimensions of the board may vary. Make the 

 holes one inch in diameter, half an inch deep, and -half 



Endosper 



Plumule 



Radicle 



FIG. 116. A Grain of Corn cut 

 Lengthwise 



