182 SCALY AND FURROWED BARK 



and others. It is also characteristic of Quercus Ilex, of 

 Alnus, and, to a certain extent, of some Elms (e.g. the var. 

 Ulmus effusa) and of Populus alba and P. tremula, as well 

 as of Morus (see below, p. 187). 



Truly scaly bark also occurs in some Conifers, e.g. Pinus 

 sylvestris, Taxus, &c., but these have been already dealt 

 with by characters of the persistent foliage, &c. 



tt Bark of stem sooner or later with evident 

 longitudinal fissures. 



(N.B. This is also true of Salix babylonica, Populus 

 nigra var. pyramidalis, Pinus sylvestris and other Pines, 

 Alnus glutinosa, Ulmus campestris, Fraxinus excelsior, 

 already dealt with on account of other prominent 

 characters. 



The following trees do not show the fissures until the 

 tree is rather large, and 20 30 feet or so in height : 

 JEsculus, Tilia, Fraxinus, Juglans, and Populus alba. 

 Several smaller trees remain for many years devoid of 

 definite fissures, e.g. Cytisus Laburnum, species of Prunus, 

 Pyrus, fec., and there is danger of mistaking such for 

 smooth-barked trees.) 



[For(o O) Crown taller than broad, slightly elongated 



seep. 205.] i.e. ovoid or obovoid, oblong, rounded- 



pyramidal, dome-shaped or more or less 

 spheroidal. 



[For f~J Predominant colouring of branches and 



(ZZ7ZI7) stems pale: greenish-white, grey or buff 



see p. 193.] t i nts . 



(Pale grey to buff tints are less common than the 

 darker hues in trees, especially apart from the foliage. 

 Greyish foliage and young growths are characteristic of 

 some Willows, White Poplar, Aspen, Ash, Pyrus Aria, 

 Quercus Ilex, and a few others, but the trees of the 

 present section have pale-tinted branches in winter, 



