30 SHRUBS. 



Simple. 



175. Leaves entire. 176. 



Leaves, or most of them, toothed. 195. 

 Leaves lobed. 218. 



Entire. 



176. Leaves with translucent oil-glands. Hypericum. 

 Leaves not pellucid-dotted. 177. 



177. Very aromatic when crushed. Calycanthus. 

 Not noticeably aromatic. 178. 



178. Leaves very large, cordate : pith excavated. Paulownia. 

 Leaves moderately small or else pith continuous. 179. 



179. Pith chambered or excavated : twigs slender. 180. 

 Pith continuous. 181. 



180. Buds solitary or collateral. Symphoricarpos. 

 Buds often superposed. Lonicera. 



181. Leaves long, narrow and willow-like. Chilopsis. 

 Leaves not willow-like. 182. 



182. Half-woody: often dying b?ck in winter. 183. 

 Fully lignified. 184. 



183. Leaves glossy. Fontanesio.. 

 Leaves dull. Clerodendron. 



184. Leaves white beneath, with appressed twin-hairs. Cornus. 

 Leaves without twinned hairs. 185. 



185. Leaves rather small (scarcely 25 mm. wide). 186. 

 Leaves distinctly larger. 191. 



186. Leaves microscopically dotted beneath. Ligustrum, 

 Leaves not dotted. 187. 



187. Leaves obtuse, nearly as broad as long. Symphoricarpos. 

 Leaves acute, more elongated. 188. 



188. Some stellate hairs on twigs or leaves. Deutzia. 

 Without star-shaped hairs. 189. 



189. Leaves separated, in 4 ranks. Rhamnus. 

 Leaves in opposite pairs. 190. 



190. Leaves small (scarcely 2 cm. long), rough. Fendlera. 

 Leaves distinctly larger. Cornus. 



IQI. Leaves whitened beneath, rough-ciliate. Syringa. 



Leaves at most paler green beneath. 192, 



