84 



BUDS AND STIPULES 



There are, moreover, some cases in which stipules are 

 developed so early that they serve not only to protect the 

 younger leaves, but even the blade of the leaf to which 

 they belong, as, for instance, in the Common Pea (fig. 26, 

 p. 23), Lathyrus maritimus (fig. 296, p. 175), &c., Virgi- 

 nian Creeper (fig. 126), Vine (figs. 127,128),Hop (fig. 48, 

 p. 34). These will be alluded to in a subsequent chapter. 



FIG. 127. FIG. 128. 



VINE (Vitis vinifera). 



FIG. 127. Tip of growing shoot, nat. size; l\l',l\ three youug leaves in order of 

 succession ; St l , 8t' 2 ,St 3 , one of the pair of stipules belonging to each of the three 

 leaves ; f, tendril with its bract removed, showing the first fork. 



FIG. 128. Apical bud after removing the three leaves shown in fig.127, x 5; Z 4 , the fourth 

 leaf in succession ; St*, one of the stipules belonging to I* ; St s , a stipule belonging to 

 the fifth leaf ; t, tendril almost enclosed in its bract ; 6, the bract, a modified 

 leaf with three nerves in the sheathing base, which appears to consist of stipules 

 adnate to the base of the petiole. 



In Petteria mmentacea (figs. 129, 130) the stipules 

 are at first small and obtuse. They have a covering of 

 hair, and are axillary and slightly connate. The leaves 

 are deciduous, but their stipules are persistent, and 

 swell up or grow to considerable size, becoming thick 

 and fleshy. Every lateral bud is, therefore, completely 

 covered and effectually protected by the pair of stipules 

 belonging to the leaf of the preceding year. These 



