GAMOPETAL.E. KEY TO THE ORDERS. C5 



(13) Flowers regular. (14). 

 Flowers irregular. (37). 



(14) Stamens hypogynous. (15). 

 Stamens epipetalous. (18). 



(15) Ovary 1-celled, ovule 1, x^endulous. Herbs Plumbaginese. 



Ovary 5-celled, cells many-ovuled. (16). 



(16) Trees, shrubs or shrubby herbs, leafy. (17). 



Leafless herb, parasite Moiiotropea?. 



(17) Anthers opened by terminal pores Ericaceae 



Anthers opened by longitudinal slits Diapensiacese. 



(18) Ovary of two free carpels with connate styles or stigmas, or carpels 



separable. Carpels not confluent. (19). 

 Ovary of two or more confluent carpels. (21). 



(19) Leaves opposite. (20). 



Leaves alternate, carpels each 2-lobed Apocynacete, (Ccrberci). 



(20) Pollen grains free, Apocynacese. 



(in Mdoctinus carpels confluent, in Rauwdfia they are partly confluent). 

 Pollen in waxy or granular masses Asclepiadeax 



(21) Ovary 1-celled, placenta free central, stamens opposite collora-lobes (22). 

 Ovary 1 or more celled, placenta not free central. (23). 



(22) Herbs, fruits capsular Primulacea?. 



Trees or shrubs, fruits baccate or somewhat baccate, not dehiscing. . .. 



Mj'rsinea-. 



(23) Leaves opposite, rarely ternate. (24). 

 Leaves alternate or all radical. (29). 



(24) Trees or shrubs. (25). 

 Herbs. (28). 



(25) Stamens 2, ovary 2-celled, cells 1-ovuled Oleacea*. 



Stamens 4-5. (26). 



(26) Anthers connivent, adnate to stigmas Apocynacese. 



Anthers free. (27). 



(27) Ovary 1-4-cellcd, placenta axile or sub-basal. (28). 



Ovary 1-celled, placenta parietal, ovules very many. . . Gent i ana cese. 



