172 THE NATURE AND WORK OF PLANTS 



bristles over the remainder of the fruit. 

 Make a drawing, showing form and ar- 

 rangement of bristles. 

 h. Cut across the fruit, and note the struc- 

 ture of the outer walls which bear the 

 bristles, and that the fruit is two-seeded. 



II. The seeds. 



a. The seeds are unequal in size. 

 h. The seed-coats are distinct in texture and 

 color. Describe. 



III. The emhryo. 



a. The embryo seems to fill the entire seed. 

 The food is stored up in two oblong 

 oval leaflike bodies, the cotyledons, 

 which are whitish in color. 



h. The 2^^umide, or young leaves, may be 

 found between the cotyledons and the 

 short main root below them. Draw 

 the embryo. 



IV. Germination. 



a. Examine twenty seeds which have lain in 

 moist soil for a month, and from each 

 fruit generally but one plantlet will 

 have grown. Take up the fruit which 



