KBY TO THE FAMILIES. 21. 



205. Leaves opposite exstipulate. (Hypericum). 



98 GUTTIFERAE. 



Leaves alternate stipulate. 2O6. 



206. Anthers 1 celled. 95 MALVACEAE. 

 Anthers 2 celled. 207. 



207. Filaments free. 94 TILIACEAE. 

 Filaments united. 96 STERCULIACEAE. 



208. (180) Anthers 5 opening at apex united. Posterior sepal 



spurred. Succulent herbs. (Impatiens). 



91 BALSAMINACEAE. 

 Flow^ers not as in Impatiens. 209. 



209. "Water lilies" with large cordate or peltate, floating leaves, 



and numerous petals and stamens. (Nymphaea). 



46 NYMPH AEACEAE. 

 Not water lilies as above. 2IO. 



210. Herbs with usually trifloliate leaves, 10 stamens united at 



base, 5 alternate shorter, styles 5, ovary 5 lobed, 5 celled. 



(Oxalis). 71 OXALIDACEAE. 



Flowers not as in Oxalis. 2II. 



211. Tree with pinnate leaves and ovate deciduous stipules. Calyx 



5 parted deciduous, stamens 10, ovary 2 celled, styles 2 

 diverging, fruit 2 horned capsule separating from a cen- 

 tral column. (Cunonia) 63 CUNONIACEAE. 

 Plants and flowers not as in Cunonia. 2I2. 



212. Stamens fewer than twice as many as the petals. 2l3. 

 Stamens twice as many as petals or more. 2I8. 



213. Calyx valvate in the bud. 2I4. 



Calyx imbricate or open. 2l5. 



214. Stammens united at base hypogynous. 96 STERCULIACEAE 



Stamens free perigynous. 107 LYTHRACEAE. 



215. Leaves pellucid dotted aromatic alternate exstipulate. 



(Heteropyxis) 111 MYRTACEAE. 

 Leaves not pellucid dotted. 2I6. 



216. Leaves opposite. (Salacia) 86 HIPPOCRATEACEAE. 

 Leaves alternate. 2l7. 



217. Leaves pinnate. (Melianthus) 90 MELIANTHACEAE. 

 Leaves simple. 85 CELASTRACEAE. 



218. (2I2) Filaments united in a tube at least at the base. 2l9. 

 Filaments free or united in several bundles. 22I. 



219. Anthers 1 celled. 95 MALVACEAE. 

 Anthers 2 celled. 22O. 



220. Sepals valvate. Leaves stipulate. 96 STERCULIACEAE. 

 Sepals imbricate in bud. Leaves exstipulate. 



77 MELIACEAE. 



221. Herbs with opposite entire exstipulate leaves and numerous 



stamens in 3—5 parcels (Hypericum) 98 GUTTIFERAE. 

 Not as in Hypericum. 222. 



