ON. BUDS 5 



The figure also shows how admirably the peculiar 

 form of the leaf is adapted to their mode of growth. 

 In many other plants also the leaves, as they develop, 

 successively protect the younger ones. 



A somewhat similar case is afforded by Uvaria 

 (figs. 105, 106, p. 70)-; and also by common Rhubarb, 



FIG. 5. MESEMBKYANTHEMUM. 

 I, I, pair of leaves, connate, and 

 sheathing in their lower half ; 

 p, from this point to the base 

 the leaves are attached to the 

 axis, and axillary buds arise 

 exactly at this place ; a, axis ; 

 ill, next younger pair of leaves. 



FIG. 6. APEX OF SHOOT OF STACHYS 

 SYLVATICA, showing two succes- 

 sive pairs of leaves. Nat. size. 



where the delicate new leaves in the centre of the 

 plant are protected by the large, horizontally spreading, 

 older ones. 



Figs. 3 and 4 show the arrangement in one of the 

 St. John's Worts (Hypericum calycinum). Each pair of 

 opposite leaves is at first apposed by their edges, 



