DEVELOPMENT OF LEAVES AND STIPULES 55 



The rudimentary leaves in the Rose pass gradually 

 into the bud-scales ; the transition is not so abrupt as 

 in the Aucuba or in Maples (fig. 8, p. 7). 



If we examine a Rose-bud in winter, the first or 

 outermost scale (fig. 89) is unequally triangular, as a 

 rule acute, carinate, and small. The second one is very 

 similar, at least in the case of lateral buds. The third 

 scale (fig. 90) is much larger, and rounded at the 

 apex, or occasionally emarginate by the breaking away 

 of the tip, and more or less strongly carinate. The 



89 90 91 92 93 94 



Bud-scales of Kosa canina, x 2. 



Fn:. Kf), first soak: : Fig. 90, third do. ; Fig. 91, fourth do.; Fig. 92, fifth do.; 

 I'm;. 93, sixth do. ; FrG. 94, ninth do. 



fourth scale (fig. 91) is twice as large as the third, 

 broad at the apex and tridentate, the middle tooth 

 representing the petiole, and the more obtuse lateral 

 ones the stipules. 



The fifth scale (fig. 92) is rather narrower, but 

 covers about half of the bud, and the middle tooth is 

 slightly the longest. The sixth scale (fig. 93) is the 

 longest, surmounting the bud, and folded round it so 

 as to cover about three-fourths of its surface ; the 

 three teeth are about equal in length. From this point 

 onwards the scales get rapidly shorter and smaller. 

 With this difference the seventh and eighth scales are 



