66 



SPRING FLOWERS. 



P. trenmla : tree ; leaves deciduous, orbicular or rhom- 

 boidal, smooth on both sides, irregularly and rather coarsely 

 toothed, with slender stalks which twist readily, so as to keep 

 the leaves in motion ; catkins small. Aspen. Woods. Fl. 

 March, April. 



P. nigra : tree ; leaves deciduous, triangular-ovate, taper- 

 ing at the point, serrated, smooth on both sides ; catkins two 

 inches long, lax, cylindrical. Damp places. Fl. March. 



(85) Fagus. BEECH. 



F. sylvatica : tree ; leaves deciduous, ovate, obscurely 

 toothed, silky when young, afterwards glabrous ; male cat- 

 kins globular on pendulous stalks, females erect globular 

 softly hairy. Woods. PL April, May. 



(86) Quercus. OAK. 



Q. Bobur : tree ; leaves deciduous, cuneately oblong, irre- 

 gularly sinuated or almost pinnatifid, sessile or shortly stalked ; 

 fruits clustered above the middle of a long peduncle (2-G 

 inches long) . Woods and hedges. FL April. 



Q. sessiliflora : tree ; leaves deciduous, cuneately-oblong, 

 irregularly sinuated, stalked, the stalks |-1 inch long; fruits 

 solitary or clustered, sessile on the branch, or seated on a 

 short peduncle (rarely 1 inch long). Woods. FL April. 



(87) Corylus. HAZEL. 



C. Avellana : shrub or small tree ; leaves deciduous, round- 

 ish heart-shaped, pointed, obscurely lobed, doubly coarse tooth- 

 ed ; male catkins long drooping cylindrical ; females resem- 

 bling ovate leaf-buds, with a few crimson threads. Nut, or 

 Hazel-nut. Coppices and thickets. FL April. 



