Vlll 



General Key to the Families 



Cyrilla Family. 



Holly Family. 



Staff Tree Family. 

 Canotia Family. 



Buckthorn Family. 



Tf1[ Ovules pendulous, the raphe away from 

 the axis of the ovary, or erect or ascending. 

 Ovary one-celled; sap resinous. SuMAC Family. 



Ovary two to several-celled; sap not resinous. 

 Leaves pinnately veined, simple. 



Seeds without an aril; ovules one in each 

 cavity of the ovary. 

 Flowers racemose, perfect; fruit dry. 

 Flowers not racemose, mostly imperfect; 

 fruit fleshy. 

 Seeds with or without arils; ovules 2 or 

 more in each cavity. 

 Foliage normal; parts of the flowers in 



4's. 

 Leaves none; parts of the flowers in 5's. 

 Leaves palmately veined, simple, or compound. 

 Leaves opposite. 

 Flowers regular. 



Fruit a bladdery capsule. 

 Fruit a pair of samaras. 

 Flowers irregular; fruit a leathery cap- 

 sule. 

 Leaves alternate. 



II II Stamens alternate with the sepals; 



ovules erect. 

 §§Stamens usually very numerous (few 

 in the Chocolate and Hand Tree 

 Families. 

 ||Sepals valvate; placentae united in the 

 axis of the ovary. 

 Petals present. 



Anthers 2-celled; stamens distinct, or in sev- 

 eral groups. 

 Anthers i -celled; stamens imited into a tube 

 surrounding the pistil. 

 Petals none, in our species; stamens united into 

 a tube. 

 Fruit, in our species, of separate follicles. 

 Fruit a capsule, 4-or-5 valved. 



1 1 1 1 Sepals or calyx-segments imbricated 

 or convolute; placentae mainly parie- 

 tal. 

 Sepals separate. 

 Stamens united into a tube. 

 Placenta; parietal; aromatic plants. 

 Placentae axile; resinous plants. 

 Stamens separate. 

 Fruit capsular. 



Styles none; leaves small, scale-like. 

 Styles present; foliage normal. 



PAGE 



604 



617 

 620 



630 

 63s 



671 



Wild Cinnamon Family. 697 

 Balsam Tree Family. 699 



Tamarisk Family. 701 



Tea Family. 703 



