DISPLACEMENT OF LEAVES. 89 
trophy, whether that excess of development take place 
laterally or lengthwise (see elongation). Atrophy or 
suppression will also frequently bring about an altera- 
tion in the position of leaves; sometimes in such a 
manner that the place of the suppressed organ is 
occupied by another one. One of the most curious 
instances of displacement of leaves arising from sup- 
pression is that mentioned by Morren,’ where, in 
Gesnera Geroltiana, a large leaf apparently occupied 

Fig. 41—Ordinary arrangement of leaves in fascicles of three in 
Pinus pinea and unusual arrangement of leaves of same plant in spires. 

| + Bull. Acad. Belg.” t. xvii, part 1. p. 387. 
