DESCRIPTION OF TREES. 163 



Fern-leaved oak (Q. r., var. asplenifolia). 

 Variegated oak (Q. r., variegata). 

 Purple-leaved oak Q. r. , var. atropurpurea) . 

 Pyramidal oak (Q. r., var. fast igiatd). 



CHESTNUT OAK (Q. Prinus). The leaves of this species 

 are very much like those of the common chestnut, but not 

 so narrow or so pointed. It succeeds best in rather strong 

 rocky soil. 



ELMS. Under the heading of " Street-trees " the white 

 and slippery elm were described. Both of these species are 

 equally adapted to the lawn, where high-spreading forms 

 are desired, but they are gross feeders and it will be found 

 somewhat difficult to make other trees, shrubs, or plants 

 grow near them. An abundance of plant-food, however, 

 applied each fall will help to make both the elms and what- 

 ever may be planted among their roots grow satisfactorily. 



ENGLISH ELM (Ulmus campestris). Although of a 

 sturdy, vigorous, upright growth, it does not reach the 

 beauty and grandeur of our American elm. As with the 

 English oak, this species takes many interesting forms, some 

 of which are very beautiful. 



SCOTCH ELM (U. c., var. Montana). Much like the 

 last, but with a rather more upright and heavy growth. 



All of the elms are subject to the attack of the elm-scale 

 (Gossyparia), canker-worm, and the elm-beetle, which see 

 on pages 270-274. 



EUROPEAN LARCH (Larix Europea). This is one of the 

 most beautiful and rapid growing trees, and except when 

 injured by the pine saw-fly, an insect the larva? of which 

 destroy the foliage in the summer, and an aphis or plant- 

 louse that sometimes checks its growth, is a most desirable 



