LEAVES AND BUDS. 



145 



the third pair ; then come two or three pairs of still larger scales which 

 cover the top of the bud. Within these we see a pair, or two pairs, of 

 soft greenish sticky scales, each often having at its tip five little lobes ; 

 then come the foliage- leaves, covered with down and folded up. While 

 dissecting the bud, keep dipping it into alcohol to make it less sticky 



'. 



Fig. 50. Twigs of Horse Chestnut 



and easier to examine. How many young leaves are visible ? In the 

 large uppermost buds the axis is prolonged above the young leaves 

 and bears numerous young flowers in tufts. 



When the bud is about to open it swells up considerably, then the 

 scales become loosened, the inner scales grow up and bend outwards, 

 and the young leaves emerge with the leaflets (how many to each leaf ?) 



S. B. 10 



