BUDS 



183 



Notice the manner in which the separate leaflets are folded 

 in the bud and make a diagram of it ; how does it differ 

 from that of the buckeye ? (Vernation 

 is always best observed in partly ex- 

 panded buds.) This kind of vernation, 

 in which each leaf or leaflet is rolled 

 over from one side to the other, is called 

 convolute. Plum, apple, canna, calla 

 lily, offer good examples of it. 



Are there any flower clusters in your 

 hickory bud ? if not, look for one that 

 has them. Are they axillary or ter- 

 minal? Will they stop the further 

 development of their branch ? Why 

 or why not ? 



335. Expanding bud 

 of English walnut, show- 

 ing twice conduplicate 

 vernation. 



257. Buds with Stipular Scales. Sketch a bud of the 

 tulip tree, or other magnolia, on the outside. (The India 

 rubber tree, oak, beech, and hack- 

 berry, furnish other examples of stip- 

 ular scales.) How does it differ in 

 appearance from the ones already ex- 

 s amined ? Remove the outer pair of 

 scales and observe that (in the tulip 

 . 5 tree) their edges do not overlap as 

 in the imbricated arrangement, but 

 merely touch, or in 

 botanical language, 



33 6.-Bud of tulip are valvate. Notice 

 tree, showing stipuiar the difference in color 



scales:,. ..stipules. between the outer 



and inner scales. Why are the outer 

 pair so hard and thick ? Draw a cross 

 section of the bud as it appears under 

 the lens, showing the small round objects cessive leaves (1-7) 

 that appear here and there between the v 

 scales. Can you make out what they are ? Draw 2 verti- 

 cal section. Do you see anything like a flower bud ? If 



