DICOTYLEDONS 



S3 



common cherry and apple ; leaves oi P. capriceda ; 

 bark of P. virginiana ; flowers and kernels of the 

 sloe {P. spinosa)\ leaves of P. {Cerasus) aceda ; 

 bark and almost all parts of Sorbus {Pyrus) 

 Atiaiparia, hybrida, and torminalis ; young twigs 

 of the hawthorn {Cratcegus Oxyacanthd). 



Leaves and partly also the flowers of the shrubby 

 species of Spircea, as of 5. Anmacs, S. sorbifolia, 

 and S. japonica ; but the 

 bark and green parts of 

 herbaceous species of 

 Spircea yield no prussic 

 acid. 



Melon Family {Cu- 

 curbitacecB). — The follow- 

 ing is the only British 

 representative of this 

 large and important 

 family : — 



Bryony {Bryonia 

 dioica^ Fig. 20).^ — It is 

 dioecious, the male and female flowers being on 

 different plants. The roots are often of an immense 

 size, sometimes nearly two feet long, thick as a man's 

 arm, white, succulent, and fleshy, with an acrid, 

 bitter, and disagreeable taste. It is occasionally 



^ It is also known as White Bryony, Tetter-berries, Wild 

 Hops, Wild Vine, and Wild Nep ; the last being the mediaeval 

 name. 



Fig. 20. Bryonia dioica ; Bryony. 



