360 THE BIOLOGY OF THE PLANT 



i. /Shape. — "What is the shape of the bud before it be- 

 gins to expand ? How does the shape change as 

 expansion goes on ? Of what use may this par- 

 ticular shape be ? 



e. Size. — Measure the length and diameter of the bud 

 before it swells. As the bud expands, which in- 

 creases the more, the length or the diameter? 

 Do you find any especially small buds? If so, 

 does their position correspond to that of the 

 larger buds ? How do you account for the pres- 

 ence of the small buds ? 



Draw several of the buds. 



d. Color. — "What is the color ? Is the bud evenly col- 



ored ? To what parts of the bud is the color con- 

 fined? Of what use is this particular color? 



e. Structure. 



1. The bud-scales. — In what part of the bud are 

 they found ? Does this position have any rela- 

 tion to that of the leaf -scars on the stem? 

 How many scales are there? "What is their 

 color ? Are they evenly colored ? What vari- 

 ations in size, shape, and color? "What is the 

 texture of the base of the scale ? Of the top % 

 Of the edge ? How does the inner differ from 

 the outer surface? Ifotice the variiish. on the 

 outside of the bud. Do you find it anywhere 

 else than on the scales ? Do you find it on aU 

 of the scales ? On all parts of the scales ? Of 

 what use is it ? Is the scale at all leaf -like in 

 structure? In color? In shape? At what 

 time of year are the scales formed ? Do they 



