280 



BUCKTHORN. MAPLES 



(/3) Cotyledons slightly 2-lobed at the apex. 

 Rhamnus catharticus. Buckthorn (Fig. 160). 

 (ii) Cotyledons not lobed : entire. 



[For (/3) 

 see p. 283.] 



[For (**) 

 see p. 282.] 

 [For (ff) 

 see p. 281.] 



Fig. 160. Rhamnus catharticus, Buckthorn (E.D.). 



(a) Cotyledons long and narrow, linear-oblong 

 or lanceolate, at least 3 4 times as long 

 as broad. 



* Primary leaves opposite, simple. 



t Primary leaves more or less cordate; coty- 

 ledons with 3 parallel nerves. 



Petiole and margins of primary leaves 

 ciliate. 



Acer campestre. Maple (Figs. 161, 162). 



Petioles and leaves quite glabrous. 

 l~~l Cotyledons with transverse cracks. 



Acer platanoides. Norway Maple (Fig. 109). 



Cotyledons devoid of transverse cracks. 



