BIRCH. BLACK CURRANT 287 



Pyrus Aucuj)aria. Rowan. 



/Z7ZZ7 First leaf a mere rudiment; the second 

 angular^ hardly trifid. 



Hedera Helix. Ivy (Fig. 176). 



® ® Primary leaves and shoot distinctly hairy. 



ri 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, f (E.D.). 



n n Primary leaves 'pubescent., with no special 

 odour; cotyledons sub-coriaceous. 



Crataegus Oxyacantha. Hawthorn (Fig. 153). 



+t Primary leaves entire or toothed but not cut 

 into lobes. 



® Primary leaves entire., or merely sinuous. [For(OG) 

 n Primary leaves opposite. l-„ ^' '■' 



§ Cotyledons large, about 1 5 — 30 x 25 — 45 ( [^ £7 ) 

 mm., broader than long. ^sep 89.] 



