VERNATION.— LEAF-BUD. 



37 



51. In early spring, before the leaves are expanded, wo 

 find them folded up in the bnds. This is called the verna- 

 tion of the leaves (from the Latin vermis^ spring). In this 

 condition the yonng leaves are closely packed in many curi- 

 ous modes, which are described in the Class 

 Book, §§ 209-214. 



52. If w^e dissect and carefully examine a 

 .welling leaf-bud in early spring, we observe 

 in the midst of it a tender point of a growing 

 pith, bearing and covered by many circles of 

 little leaves and scales, packed as close as 

 possible. Fig. 94 shows a twig with two 

 buds as if split through the axis, exhibiting 

 the pith, growing point, young leaves, and 

 scales. 



53. According to this figure and the next 

 (9-1), buds are either terminal (^), situated at 

 the end of the stem or twig, or lateral (a), 

 situated on the side. But we must more care- 

 fully define the position of the lateral buds, 

 you that they are amllary^ or located in the axil of a leaf, 

 you would not understand, until knowing that the axil of a 

 leaf is the upper angle between the leaf-stalk and the stem. 

 (See 5, Fig. 90.) IS^ow, remember this rule, which you may 

 Boon confirm by your own observation, that there is a hud at 

 the termination of every stem or hranch^ and in the axil of 

 emery leaf. 



Fig. 93. A twig, 

 with two lateral 

 and one terminal 

 bud. 



Fig. 94, Same, 

 split through the 

 two buds. 



Should we tell 



51. Wliat is the meaning of the term 'cernation? 



52. Give a careful definition of a leaf-bud. 



53. What is a terminal bud ? "What an axillary ? Where are buds al- 

 ways found ? 



