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The Museum Gazette 



ones probably resulted from the attack of a gall-fly, though 

 the resultant gall may have fallen off. For the purposes of 

 comparison, leaves of the Turkey oak and other alien species 

 exhibiting brilliant autumnal tints are placed here. 



Beech (Fagus sylvatica). 

 The leaves of the beech pass through various colour changes 

 from pale yellow to dark reddish-brown. The change is a sym- 

 metrical one, the yellow tint first appears at the margins and tip 

 of the leaf and gradually spreads until the mid-rib is reached. 



Pear (Pyms communis). 



There are numerous cultivated forms, and similar colour 

 changes are observable in the leaves of all. They are at first 

 yellow with brownish patches, then red or reddish-yellow with 

 dark blotches, finally dark brown. The under-surface never 



assumes a red tint. 



Hazel (Covylus avellana). 



The leaves are bright yellow at first, later they are either 

 mottled with brown or that tint on the margin in a symmet- 

 rical arrangement. The change from yellow to brown is usually 

 a quick one. In some cases the leaves quickly assume a dark 



brown tint. 



Bramble (Rubus, many species). 



The bramble is practically an evergreen. A few leaves 

 turn yellow and fall at intervals throughout the year, such are 

 here exhibited. (For spotted leaves see another frame.) 



Goat Willow (Salix capvea). 

 The leaves are mottled with green, red and black. They 

 never become uniformly red or black, and the lower surface 

 always remains of a greyish-green hue. 



White Beam (Pyms aria). 

 The leaves assume a jellowish-brown tint with beautiful 

 dark brown marginal markings arranged quite symmetrically. 

 The brown gradually spreads over the entire leaf. The lower 

 surface always remains of an uniform greyish tint. 



