VIl] 



NUMBERS OF BUD-SCALES 



53 



Vine Poplars Willows 



Guelder Rose Ampelopsis Hawthorn 



Mulberry Hop Magnolia 



Beech Ailanthus. 



The number of bud-scales varies considerably. While 

 the Willows, for instance, only present a single scale to 

 the external view really formed of two scales fused into 

 one the buds of many Pines and Firs may have as many 

 as a hundred to three hundred and fifty. Very useful 

 characters for diagnostic purposes are afforded by the 

 practically constant number of scales observable externally 

 in each species. Thus, there is but one scale exposed in 

 Willows Guelder Rose. 



Two or three scales are visible in 

 Lime Alder Plane 



Sarothamnus Bittersweet Fig 



Vine Ampelopsis Hippophae 



Laburnum Chestnut. 



There are about two to four exposed in 

 Dogwood Privet Ash. 



The following have several scales, i.e. about five or six 

 to ten or a dozen visible : 



Black Currant 



Walnut 



Sweet Gale 



Rose 



Daphne 



Rowan 



Cherry 



Cotoneaster 



Hazel 



Maples 



Spindle Tree 



Gooseberry 



Ailanthus 



Mulberry 



Blackberry 



Apple 



Beam 



Blackthorn 



Elms 



Buckthorn 



Horse-chestnut 



Elder 



Red Currant 



Birch 



Barberry 



Poplars 



Pear 



Hawthorn 



Clematis 



Birch 



Sycamore 



Lilac 



Symphoricarpos. 



