140 PRACTICAL COURSE IN BOTANY 



ory, walnut, oak, etc., the position of the 

 flower clusters is different from that of 

 flowers in the buds of lilac and horse-chest- 

 nut. Look for a bud containing them, and 

 find out where they occur. Can the axis con- 

 tinue to grow after flowering, in this kind of 

 stem? Give a reason for your answer. Make 

 sketches in transverse and longitudinal sec- 

 tion (see Figs. 102, 163) of two different 

 kinds of buds, illustrating the terminal and 

 axillary position of the flower cluster. 



157. Dormant buds. — A bud may often 



lie dormant for months or even years, and 



then, through the injury or destruction of its 



stronger rivals, or some other favoring cause, 



develop into a branch. Such buds are said 



to be latent or dormant. The sprouts that 



often put up from the stumps of felled trees 



Fig. 1G4. — Twig originate from this sourcc. 



tj'l^it^; 158. Supemumerarybuds.-Wheremore 



bud. b; rs, ring of than ouc bud dcvclops at a node, as is so 



scars left by last n, ,-, • ,^ ^ ^ ^ 



year's bud scales, otteu the casc m the oak, maple, honey 

 (After Gray.) locust, etc, all exccpt the uomial one in the 



axil are supernumerary or accessory. These must not ])e con- 

 founded with adventitious buds — those that occur elsewhere 

 than at a node. 



Practical Questions 



1. Would protected buds be of any use to annuals ? Why, or why not ? 



2. Of what use is the gummy coating found on the buds of the horse- 

 chestnut and bahn of Gilcad ? (148.) 



3. Can you name any plants the buds of which serve as food for man ? 



4. How do flower buds differ in shai)e from leaf buds ? 



5. At what season can the leaf bud and the flower bud first be dis- 

 tinguished ? Is it the same for all flowering plants ? 



6. Watch the different trees al^out your home, and see when the bud3 

 that are to develop into leaves and flowers the next season arc formed in 

 each species. 



