54 ARRANGEMENT OF BUD-SCALES [CH. 



Twenty or more scales are visible in 



Oaks Bird Cherry Plum 



Azalea Beech Hornbeam 



Rhododendron Honeysuckles. 



Numerous scales, up to a hundred and more, occur in 



Larch Silver Fir Cedars 



Pines Spruce. 



The arrangement of the bud-scales in the bud also 

 presents several features of interest. 



In trees with opposite and decussate leaves and buds, 

 the scales of the latter are usually also opposite and de- 

 cussate, so that transverse sections across such buds 

 present a more or less quadrilateral figure, sometimes 

 with further angularities due to the midribs of the scales 

 when such are pronounced. This type of bud with de- 

 cussate scales is found in 



Ash Privet Lilac 



Spindle Tree Maples Sycamore. 



The general contour is more rounded, though the scales 

 are still opposite and decussate in the following : 



Horse-chestnut Norway Maple Honeysuckles 

 Elder Dogwood Guelder Rose 



Mistletoe Staphylea. 



In the Juniper the bud -scales, which are leaves, con- 

 form to the arrangement of the foliage, and are in whorls 

 of three. 



In shrubs and trees with alternate leaves, two types of 

 arrangement are commonly associated with the prevalence 

 of distichous or spiral buds and leaves respectively, but it 

 should be noted that stipular scales are usually twice as 

 numerous as the leaves they would belong to, and are not 



