Page:First course in biology (IA firstcourseinbio00bailrich).pdf/147

 it is more advanced, and the woolly unformed flowers are appearing. In Fig. 146 the growth is more advanced.

, as seen at 7 on the day of its opening. At 10 o'clock it will be fully expanded.

, enlarged.

Buds that contain or produce only leaves are leaf-buds. Those which contain only flowers are flower-buds or fruit-buds. The latter occur on peach, almond, apricot, and many very early spring-flowering plants. The single flower is emerging from the apricot bud in Fig. 147. A longitudinal section of this bud, enlarged, is shown in Fig. 148. Those that contain both leaves and flowers are mixed buds, as in pear, apple, and most late spring-flowering plants.

''Fruit buds are usually thicker or stouter than leaf-buds. They are borne in different positions on different plants.'' In some plants (apple, pear) they are on the ends of short branches or spurs; in others (peach, red maple) they are along the sides of the last year's growths. In Fig. 149 are shown