64 GAMOPETAL.-E. KEY TO THE ORDERS. 



Class II. Dicotyledons Oamopetalous. 



Key to the Orders. 



Series IV. Gainopetalous Flowers usually bisexual, regular or irregu- 

 lar ; calyx superior or inferior ; petals connate, forming an entire or cleft or 

 lobed corolla, rarely free to a little above the base ; stamens epipetalous, 

 liypogynous or epigynous. 



( 1 ) Ovary inferior, or semi-inferior. (2). 

 Ovary superior. (13). 



( 2 ) Stamens, epipetalous. (3). 

 Stamens epigynous. (11). 



( 3 ) Anthers free. (4). 



Anthers connate. (10). 

 ( 4 ) Leaves opposite. (5). 



Leaves alternate. (8). 

 ( 5 ) Leaves exstipulate. (6). 



Leaves stipulate or whirled Rubiaceae. 



(6) Herbs. (7). 



Shrubs. Stamens 5, Ovary 1-3-celled Caprifoliacere. 



( 7 ) Flowers not involucellate, bracteate Valeria cere. 



Flowers involucellate Dipsacese. 



( 8 ) Stamens numerous. Shrubs Styracese. 



Stamens 5. (9). 

 ( 9 ) Filaments free, semi-inferior. Campanulacese, (Sphenodea). 



Filaments connate, flowers unisexual Composite, (Xanthium). 



(10) Herbs or shrubs with tendris Cucurbitacere. 



Herbs. Leaves exstipulate, without tendrils. Ovary 1-celled, 1-ovuled. 



Composite. 



(11) Stamens 3-5. (12). 



Stamens 8-10, anther-cells spurred Vacciniaeese. 



(12) Ovary 2-celled, cells 1-ovuled Goodenoveas. 



Ovary 2-6-celled, cells many ovuled Campanulacese. 



