172 THE NATUBE AND WORK OF PLANTS 



bristles over the remainder of the fruit. 

 Malce 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. 



b. The seed-coats are distinct in texture and 



color. Describe. 



III. The embryo. 



a. The embryo seems to fill the entire seed. 



The food is stored up in two oblong 

 oval leaflike b6dies, the cotyledons, 

 which are whitish in color. 



b. The plumule, 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 



