74 OBJECT LESSONS IN BOTANY. 



riding horseback). Each leaf, first on this corner, then OTJ 

 that, infolds or overlays all that is within it. 



138. Obvolute vernation appears in the leaf-bud of Sago 

 (Fig. 228), where each leaf infolds only half of the blade of 

 itB opposite leaf. 



Vernation. Fig. 230. Cherry Icuf-bud, convolute. Fig. 231. Lilac, imbricate, 

 Fig. 232. Birch leaf, plicate. Fig. 233. Dock, revolute. Fig. 234. Balm-of-Gil- 

 ead, involute. 



139. In the bud of Dock (Fig. 233) we find the young 

 leaves -revolute, or rolled backwards from both edges; but in 

 the bud of Balm-of-Gilead (Fig. 234) they are involute, or 

 rolled inwards from both edges. This is best seen under a 

 microscope of one lens, i. e., a single microscope. 



140. In the bud of Tulip- tree (Fig. 225) each leaf is red*- 

 note, being bent over forward and infolding all within it; 

 and in the Fern (Fig. 226) it is circinate, or coiled from the 

 top downwards, like a watch-spring. 



138. The obvohite? 



139. What the vernation of Dock ? of Balm-of-Gilead T 



1 40. Please describe the reclinate ; the circinate. 



