HOW BUDS OPEN 



39 



Opening of the 

 pear bud. 



it does not. The length of the shoot usually depends more 

 on the lengths betireen joints than on the mimber of leaves. 



93. HOW BUDS OVEJU.— When the bud 

 swells, the scales are pushed apart, the 

 little axis elongates and pushes out. In 

 most plants, the outside scales fall very 

 soon, leaving a little ring of sears. Notice 

 peach, apple, plum, willow, and other 

 plants. Fig. 56. In others, all the scales 

 grow for a time, as in the pear. Figs. 



57, 58. In other plants, the in- 

 ner bud-scales become green and 



almost leaf -like. See the maple 



and hickory. Fig. 59 shows a 



hickory bud. Two weeks later, 



the young shoot had pushed out 



and the enlarged scales were hanging (Fig. 60). 

 94. Sometimes floivers come out of the buds. 



Leaves may or may not accompany the flowers. 



We saw the embryo flowers in Fig. 52. The 



bud is shown again in Fig. 57. In Fig. 58 it is 



opening. In Fig. Gl it is 

 more advanced, and the woolly un- 

 formed flowers are appearing. In 

 Fig. C2 the growth is more advanced. 

 In Fig. 63 the flowers are full blown ; 

 and the bees have found them. 



95. Buds which contain or pro- 

 duce only leaves ai-e 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. ''^^ ^^''■^' '" '"" ''"""i- 

 Fig. 64. The single flower is emerging from the apricot 

 bud in Fig. 65. Those which contain both leaves and 



