•74 



OBJECT LESSONS IN BOTANY. 



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

 that, infolds or overlays all that is within it. 



138. Ohvolute vernation appears in the leaf-bud of Sage 

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

 its opposite leaf. 



Vernation.— i^'/p'. 230. Cherry le«f-bnd,— convolute. Fig. 231. Lilac,— imbricate. 

 Fig. 232. Birch leaf,— plicate. Fig. 283. 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, *. e., a single microscope. 



140. In the bud of Tuli-p-tree (Fig. 225) each leaf is recli- 

 nate, 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. Theobvoliite? 



139. Wliat the vernation of Dock? of Balm-of-Qilead ? 



140. PleaBe describe the reclinate ; the circinate. 



