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. 



Vernalion. — Fig. 230. Clierry Icuf-bnd, — convolute. Fig. 231. Lilac,— iiubncate. 

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

 ead, — involute. 



189. In the bnd of Dock (Fig. 233) we find the young 

 leaves revoliUe^ 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 bnd of Tulip-tree (Fig. 225) each leaf is recU- 

 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. The obvolute ? 



139. ^Vliat the vernation of Dock ? of Balm-of-Gilcad ? 



140. Please describe the reclinate ; the circinate. 



