18. KEY TO THE FAMILIES. 



or if outside then leaves simple and stamens 4 — 6. 160. 



159. Flowers hermaphrodite. Petals 5, stamens 4 — 5. Ovary 4 



celled. Seeds endospermic. (Bersama). 



90 MELIANTHACEAE. 

 Flowers unisexual or polygamous. Seeds exendospermic. 



89 SAPINDACEAE. 



160. Petals and stamens hypogynous. 161. 



Petals and stamens more or less perigynous. Leaves 

 simple stipulate. Shrubs and trees. 166. 



161. Sepals 3. Petals 3 or 6. Shrubs or trees. 50 ANONACEAE. 

 Sepals 4 — 5, rarely 2. Petals 3^5. I62. 



162. Sepals 5 valvate in bud. Leaves simple stipulate. 163. 

 Sepals imbricate in the bud, or if valvate, then only 2 leaves. 



Exstipulate. I64. 



163. Anthers 1 celled. Stamens numerous and united, ovary 3 or 



more celled. 95 MALVACEAE. 



Anthers 2 celled, stamens 5, or if more, ovary 2 celled. 



96 STERCULIACEAE. 



164. Leaves opposite. 98 GUTTIFERAE. 

 Leaves alternate. 165. 



165. Leaves pinnate. Shrubs or trees. 77 MELIACEAE. 

 Leaves simple. Herbs or undershrubs (Limeum). * 



43 AIZOACEAE. 



166 (160) Stamens opposite petals. 92 RHAMNACEAE. 



Stamens alternate with petals. 85 CELASTRACEAE. 



167. (157) Flowers unisexual. 168. 

 Flowers hermaphrodite or polygamous. 170. 



168. Leaves compound. Shrubs or trees. 83 ANACARDIACEAE. 

 • Leaves simple. 169. 



169. Ovary slightly sunk, 2 celled, styles 2. (Trichocladus). 



66 HAMAMELIDACEAE. 

 Ovary wholly superior, usually 3 celled. 



80 EUPHORBIACEAE. 



170. Flowers distinctly irregular. Sepals 5. Petals 3 — 5. Stamens 



8, united into a split tube. Leaves simple. 



79 POLYGALACEAE. 



Flowers regular or nearly so, or if distinctly irregular, then 



leaves compound. 171. 



171. Filaments free. 17'?. 

 Filaments united at least at the base. 176. 



172. Disc present ring, cushion or cup shaped. 173. 

 Disc absent, leaves simple. 175. 



173. Leaves stipulate Herb. (Tribulus). 74 ZYGOPHYLLACEAE. 

 Leaves exstipulate shrubs or trees or undershrubs. 174. 



174. Flowers polygamous. 83 ANACARDIACEAE. 

 Flowers hermaphrodite. Leaves gland dotted. 



75 RUTACEAE. 



