SHRUBS. 31 



192. Buds sunken : flowers in a round head. Cephalanthus. 

 Buds evident: flowers not in heads. 193. 



193. Bud-scales hard-pointed : fruit a drupe. Chionanthus. 

 Bud-scales not hard-pointed, or else fruit dry. 194. 



194. Leaves microscopically dotted beneath : fruit dry. Syringa. 

 Leaves sometimes scurfy : fruit fleshy. Viburnum. 



Toothed. 



195. Buds naked. 196. 



Buds with a single scale, in front. Salix. 



Buds with several scales, or else concealed. 197. 



196. Buds solitary : twigs firm. Viburnum. 

 Buds superposed : twigs slender or soft. Callicarpa. 



197. Twigs with 2 conspicuous hairy lines. Diervilla. 

 Twigs without hairy lines. 198. 



198. Leaves narrow and willow-like, often whorled. Chilopsis. 

 Leaves not willow-like. 199. 



199. Pith hollowed, or with firmer diaphragms. 200. 

 Pith homogeneous, rarely spongy. 206. 



200. Buds solitary over each leaf. 201. 



Buds finally clustered : hairs not stellate. Forsythia. 



201. Glabrous. 202. 



More or less hairy. 203. 



202. Fully lignified : twigs with 4 lines or angles. Forsythia. 

 Half-wooded and tender. Leycesteria. 



203. Hairs star- or shield-shaped. 204. 

 Hairs not star-shaped. 205. 



204. Buds naked. Viburnum. 

 Buds scaly. Deutzia. 



205. Most leaves entire. Symphoricarpos. 

 Leaves regularly but shallowy toothed. Abelia. 



206. Buds concealed after leaf-fall. Philadelphus. 

 Buds exposed. 207. 



207. Partly woody, or regularly dying back in winter. 208. 

 Fully lignified. 212. 



208. Leaves glossy. ' Fontanesia. 

 Leaves rather dull. 209. 



