98 OBJECT LESSONS IN BOTANY. 
in the soil, while the bud has mounted higher, unfolding 
itself into stem and leaves, and spreading itself in the air and 
light. 
201. The young plant has now become independent of the 
seed, which will soon wither and perish. The cotyledons, in 
this case, are never able to throw off the shell, but perish 
AS), 
827 825 
Progress of germination in Maple.—Fig. 823. A seed (samara). Fig. 324. The 
same, just beginning to grow; the rootlet descends, the cotyledons have burst the 
shell, Fig. 825. The leaf-like cotyledons (¢) nearly open, the stem (s) and root (1) 
lengthening. F%g. 826. The terminal bud appears. Jig. 827. The first pair of true 
leaves expanded. Fig. 828. The second pair appear, &«. 
together with it. In other plants, however, as in Maple 
(Fig. 825), the two cotyledons escape from the shell, change 
color, and become leaves,—the first pair on the plant (¢). 
202. The bud, which we called plumule, is still seen at the 
201. When does the seed perish? Cotyledons of Oak and Maple—how 
differ in development ? 
