i6 



HOW A PLANT GETS OUT OF THK SKKI). 



groove on one side. Fig. n. A cross section made through 

 the seed will show that it is in the form of a semi-circle. Fig. 12. 

 Most of the seed is made up of the hard, horny albumen or en- 

 dosperm. The small embryo is situated at one end of the seed. 



8. FLAX SKKD. 

 This is flattened, 

 much longer than 

 broad, pointed at 

 the 1 ower e nd 

 where the seed scar 

 occurs. The seed 



is smooth rnd. ^- 



rigure n Figure 12. 



O\vn in Color Back and fpont yiew Qf Cross section date palm seed 



Now mrnQtp-n f-J-t> date palm seed. The greater part of the seed is 



hard, horny endosperm albumen 

 The err.bryo shown at e. 



Figure 14. 



Figure 13. 



Flax with radicle or rcot r, in 

 upper figure, ce>f, colylec'ons or 

 seed leaves ard p pkrr.ule. 



seed with water; you will notice that it 

 feels like mucilage. The outer part of the 

 seed-coat has the property of swelling 

 when water is added. We will cut the seed 

 lengthwise; you will notice that the brown 



Seed-COat has a light Colored substance testa with cotyledon removed. 



next to it; this is nourishing material stored outside of the em- 

 bryo and has received the name of albumen or endosperm. This is 

 similar to that found in maize, where it is mealy, only it is not so 

 abundant. The embryo is situated in the center of the seed (Fig. 

 13) and consists of the two seed leaves called the cotyledons, 

 and the conical initial stem and rootlet below, Fig. 14, 



Flax seed in process of ger- 

 mination, ffft, cotyledons, /, 



