%1 SHRUBS. 



209. Twigs very slender. Caryopteris. 

 Twigs stouter. 210, 



210. Twigs 4-sided or winged. Buddleia. 

 Twigs 2-lined. Diervilla. 



21 1. Leaf-scars raised: bundle-traces 9. Clerodendron. 

 Leaf-scars not raised : bundle-traces 3 or 5. Hydrangea. 



212. With a few or coarse branches. Hydrangea. 

 Bushy or with slender branches. 213. 



213. Leaf-scars ciliate: buds often several. Rhodotypos. 

 Leaf-scars not ciliate, or else buds solitary. 214. 



214. Bundle-traces 3 or more. 215. 

 Bundle trace one. 217. 



215. Leaves with some simple appressed hairs. Hydrangea. 

 Leaves and twigs with some small stellate hairs. Deutzia. 

 Without such hairs. 216. 



216. Leaves woolly beneath : bark quickly peeling. Jamesia. 

 Leaves not woolly. Viburnum. 



217. Buds solitary: pith often spongy. Fvonymus. 

 Buds superposed. Forestiera. 



Lobed. 



218. With nectar-glands on the petiole. Viburnum. 

 Without nectar-glands. 219. 



219. Leaves very large, cordate : typically a tree. Paulownia. 

 Leaves not very large. 220. 



220. Pith chambered or excavated. 221. 

 Pith continuous. 222. 



221. Buds clustered : pith chambered. Forsythia. 

 Buds solitary: pith excavated. Symphoricarpos. 



222. Bundle traces 3. 223. 



Bundle traces 5-7 : twigs rather stout. Hydrangea. 



223. Leaves pinnately lobed : twigs slender. Syringa. 

 Leaves palmately lobed. 224. 



224. Buds stalked, or with 2 evident scales. Acer. 

 Buds sessile, with 4 or more scales. 225. 



225. Bud-scales 6 or 8. Acer. 

 Bud-scales 4. Viburnum. 



