VERNATION. 



73 



13i. The pupil shcmld make himself well acquainted with 

 these seven modes of (Estivation (so the botanists call it). 

 Other modes are described in larger works. (Class Book of 

 Botany, p. 79.) 



135. Also in the leaf-bud we find similar modes of leaf- 

 folding (here called vernation, from the Latin vernus, spring, 

 :is aestivation is from cestivus, summer). The figures follow- 

 ing represent cross-sections of various sorts of leaf-buds. In 

 the bud of Sycamore the infolding scales are imbricate, but 

 the young leaves within are somewhat plicate. 



136. In the leaf-bud of Cherry (Fig. 230) we find the con- 

 volute vernation, similar to the aestivation of Wall-flower. 

 The leaf-bud of Lilac (Fig. 231) gives us another form of 

 imbricate. 



225 226 22T 223 229 ; 



Vernation. Fig. 225. Unfolding leaf-bud of Tulip-tree, reclinate. Fig. 220. 

 Fern leaf- bud, cireinate. Fig. 227. Sedge, equitant. Fig. 228. Sage, ob volute. 

 Fig. 229. Iris, equitant. 



137. Fig. 229 represents the vernation of Iris, and Fig. 227, 

 of a Sedge-grass. Both are equitant (which means, in Latin, 



184. What is the meaning of the word (estivation? 



135. What is the meaning of the word vernatian ? Please describe the 

 vernation in Sycamore leaf-bud. 



136. In the leaf-bud of Cherry ; Lilac. 



137. What of the equitant vernation ? 



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