The Mistletoe has never been observed to occur spontaneously in England, so 

 far as I am aware, on any of the following trees, although it has been success- 

 fully propagated on several of them : — 



The Beech {Fagus sylvestris), 



The Burch (Betula alba). 



The Bird Cherry (Pruniis Padus), 



The Wild Cherry (P. avium), 



The Sloe Tree, or Blackthorn (P. spinosa), 

 nor on any of the cultivated cherry or plum trees. 



The Hornbeam (Carpinus Beiulus), 

 The Elder (Samhuciis nigra). 

 The Holly {Ilex Europcm), 

 The Dog^vood {Cornus sanguineus), 

 The Box Tree (Buxus semper-virens), 

 nor has the Mistletoe been observed on any of the following trees naturalised 



here : — 



The Lombardy Poplar (Populus fastigiata ), 

 The Sweet Chesnut {Castanea vesca), 

 The Walnut (Juglans regia), 

 The Laurel {Cerasus Colchicum), 

 nor on any of the other many introduced varieties of trees and evergreens. 



Why the Mistletoe should attach itself to certain trees in preference to others, 

 is a mystery not yet fully solved. Common observation always refers to it some 

 peculiarity in the bark, and seems, oddly enough, pretty equally divided in opinion 

 as to whether the Viscum prefers a smooth and hard bark, or one that is rough and 

 porous. Dr. Harley from his observations, was led to suppose, " that a difference 

 in size, number, and arrangement of the medullary rays might explain it, and serve 

 to determine, in any given case, the attachment of the Mistletoe : " and he, 

 accordingly, guided by their minute anatomical structure, has arranged a list of 

 thirty trees in the supposed order of their liability to become the site of the para- 

 site. — On dividing the list into three groups, the ten trees most predisposed to 

 bear Mistletoe — and in the order in which they stand, — are stated to be : — 



The Vine 

 Maple 

 Walnut 

 Elder 

 Holly 

 Plum 

 Acacia 



Cherry Laurel 

 Portugal Laurel 

 Plum 



All these trees are common in this 

 County, and yet it is only found on the 

 Maple and the Acacia. 



