280 



BUCKTHORN. MAPLES 



(yS) Cotyledons sligldly 2-lobed at the apex. 

 Rhamnus catharticus. Buckthorn (Fig. 160). 

 (ii) Cotyledons not lobed : entire. 



[For (/3) 

 see p. 283.] 



[For {**) 

 see p.28'2.] 



[For (tf ) 

 see p. 281.] 



Fig. 160. Ehamnus catharticus. Buckthorn (E.D.). 



(a) Cotyledons long and narroiu, linear-oblong 

 or lanceolate, at least 3 — 4 times as long 

 as byroad. 



* 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. 

 n Cotyledons with transverse cracks. 



Acer platanoides. Norway Maple (Fig. 109). 



£70 Cotyledons devoid of transverse cracks. 



