48 KEYS TO THE GENERA 



A. Leaves straight-veined. Alnus (p. 312). B^tuJa (p. 311). Cas- 

 tanea (p. 314) . C6rylus (p. 313). 



A. Other shrubs with catliin flowers ; wood soft. S^lix (p. 314). 



* Flowers yellow, yellowish or orange, but not in catkins. (B.) 



B. Leaves straight-veined and oblique at base, tllmus (p. 308). 

 Coryl6psis (p.' 204). Hamamfelis (p. 202). 



B. Leaves straight-veined but not oblique at base, edge doubly and 



sharply serrate ; twigs bright green with large pith. Kfirria 



(p. 162). 

 B. Leaves clustered at ends of twigs ; flowers large, 1 inch, funnel 



form. AzSlea (p. 257). 

 B. Leaves with silvery scales ; plants often thorny ; fruit fleshy, 



1-seeded. Elaeagnus (p. 300). 



B. Leaves clustered along the branches; plants usually thorny. 

 B^rberis (p. 64). 



* Flowers pink to rosy or red. (C. ) 



C. Leaves evergreen. (Thickness and smoothness indicate ever- 

 green.) Ardtsia (p. 268). Arbutus (p. 249). CamMlia (p. 79) . 



C. Leaves deciduous and plants usually thorny. Pyrus (p. 182). 



Crataegus (p. 173). Primus (p. 142). 

 C. Leaves deciduous and plants without thorns. (D.) 



D. Flowers large, 2-5 inches, hollyhock-like. Hibiscus (p. 81). 

 D. Flowers much smaller of 5 separate petals (or double) . Prunus 



(p. 142). Pyrus (p. 182). Spirsa (p. 146). 

 D. Flowers with parts grown together into a tubular, urn-shaped, 

 or globular part. (B.) 

 E. Fruit a capsule with many seeds. Andrdmeda (p. 249) . 

 B. Fruit fleshy with 10 or more seeds. Gayluss&,cia aud Vaccfn- 

 ium (p. 244). 



* Flowere white or nearly so. (P.) 



P. Leaves evergreen. (Thickness and smoothness indicate ever- 

 green character.) (G.) 

 G. Thorny plants ; flowers J inch or more in size with 5 petals. 



Pyracantha (p. 175). Ilex (p. 80). 

 G. No thorns. (H.) 



H. Flowers large, 2-4 inches, often double in Camellia. CamfeUia 



(p. 79). Gordbnia (p. 80). 

 H. Flowers small, wheel-sliaped ; fruit white or red berries. 



Ardfsia (p. 268). Ilex (p. 86). 

 H. Flowers small, globular or ovate, 5-lobed ; fruit dry. An- 



dr6meda (p. 249) . 

 H. Other evergreens hardy only South. Photfnia (p. 179). 

 Escallonia (p. 188). Arbutus (p. 249). 



