Page:First course in biology (IA firstcourseinbio00bailrich).pdf/151



—Same twig before leaves fell.

size that they were a year ago. They are dormant. The only way for a mature bud to grow is by making leaves for itself, for a leaf will never stand below it again. The twig, therefore, has buds of two ages,—those at bbbb are two seasons old, and those on the