IV 



THE STUDY OF THE SHOOT 



47 



acorn, they form a cupule. When a single bract is large and 

 protects a series of flowers it is called a Spathe, e.g., the Arum. 



EXPT. 32. Examine the leaf of a Pea and find the stipules. Note 

 The stipules are large and leaf-like. Observe how the end of the mid- 

 rib of the compound leaf is converted into a tendril. Compare with the 

 stipules of a Rose leaf. 



EXPT. 33. Note the size, shape, and characters of as many scale 

 leaves as possible during spring, when the buds are opening. 



FIG. 64. Transverse section of leaf-bud 

 of Water Lily, (x 6.) 



Fig. 65. Bracteate leaf of 

 Narcissus. B, bract. 



FIG. 66. Transverse section through 

 leaf-bud of Lilac. (X 5.) 



Floral Leaves. Floral leaves are modified leaves which 

 go to build up the flowers of a flowering plant. 



Vernation. The way in which the young leaves are 

 folded in the bud is called vernation or prcefoliation. This 

 differs in different plants, and will be considered under two 

 heads, viz., (a] the folding of the individual leaf in the bud ; and 

 (V) the folding of the several leaves in the bud. 



