86 



BUDS 



insects by a coating of wool or down, which they afterwards 

 lose. The leaves of the tulip tree are inclosed for a little time 





FIG. 80. Types of vernation 



1, 2, cherry; :i, 4, European walnut; 5, 6, snowball; 7, lady's mantle; 8, oxalis. 



After Kerner 



B 



FIG. 87. Development of an oxalis leaf 



D 



A, full-grown leaf ; B, rudimentary leaf, the leaflets not yet evident; (7, more 

 advanced stage, the leaflets appearing; D, a still more advanced stage. />, C, 

 and D, considerably magnified. After Frank 



