BIRCH. BLACK CUHRANT 287 



Pyrus Aucuparia. Rowan. 



7O First leaf a mere rudiment ; the second 

 angular, hardly trifid. 



Hedera Helix. Ivy (Fig. 176). 



Primary leaves and shoot distinctly hairy. 



O Primary leaves glandular hairy and 

 seedling fragrant or strong-smelling when 

 bruised; cotyledons thin. 

 Cotyledons not more than 3 4 mm. 

 long. 



Betula alba. Birch (Fig. 177). 



Cotyledons 9 10 mm. long. 

 Ribes nigrum. Black Currant (Fig. 178). 



Fig. 177. Betula alba, Fig. 178. Ribes nigrum, 



Birch (E.D.). Black Currant, (E.D.). 



O r 17 Primary leaves pubescent, with no special 

 odour; cotyledons sub-coriaceous. 



Cratcegus Oxyacantha. Hawthorn (Fig. 153). 



ft Primary leaves entire or toothed but not cut 

 into lobes. 



Primary leaves entire, or merely sinuous. [For ( O G ) 



D . 7 . seep. 289.1 



O Primary leaves opposite. ,--p o 



Cotyledons large, about 15 30 x 25 45 (/~7/~7) 

 ., broader than long. see P 89.] 



