88 



YOUNG AND OLD LEAVES. 



most Maple leaves the folding is not along the 

 ribs, but along the short side nerves. Between 

 these large folds are smaller ones, and so this form 



FIG. 17. VERNATION. 



I, 2, of the Cherry (Prunus Avium); 3, 4, of the Walnut (Juglans regia); 5, 6, of the Snow- 

 ball (Viburnum Lantana); 7, of the Lady's Mantle (Alchemilla vulgaris); 8, of the 

 Wood-Sorrel (Oxalis acetosella). (" Pflanzenleben.") 



of vernation makes a connecting link with corru- 

 gate vernation. 



The folding of the leaves of the Beech, the Oak, 

 and many other plants is peculiar. Every leaf has 



