66 GAMOPETAHE. KEY TO THE ORDERS. 



(28) Stamens didynamous Verbenaceae. 



Stamens equal Loganiacese. 



(in Mitrasacme Ovary 2-celled, cells many-ovuled, stamens 5). 



(29) Aquatic herb, leaves floating, ovary 1-celled. Gentianaceae, 



(Limnanthemum). 

 Terrestrial. (30). 



(30) Herb with cauline leaves, or shrubs or trees. (31). 



Herb, with all radical leaves PI antagi nese. 



(31) Ovary 1-celled, ovules many, placenta parietal, undershrubs 



Gesneraceae, (Isanthera). 



Ovary 2- or more-celled. (32). 

 (32)) Ovary 2-4-celled, ovules 4. (33). 



/9) Ovary 2-celled, cells many-ovuled. (33a). 



f) Ovary 2-6-celled, cells 1-2 ovuled, shrubs or trees. (34). 



(33) Styles 2 Hydrophyllaceae. 



Styles 1 Solanacese. 



(33) Corolla plaited in bud Convolvulaceso. 



Corolla-lobes imbricate in bud Boraginese. 



(34) Flowers bisexual. (35). 



Flowers unisexual or polygamous. (36). 



(35) Leaves simple. (35r/). 



Leaves compound Ampelideae, (Leca). 



(35a) Ovary-cells 1-ovuled ' Sapotacese. 



Ovary-cells more than 2-ovuled Styracese. 



(36) Petals contorted, sepals accrescent Ebenaceae. 



Petals imbricate Oleaceae. 



(37) Leafless herbs. (33). 



Leafy herbs, shrubs, or trees. (40). 



(38) Stamens 4, didynamous, anthers 1-2 -eel led. (39). 



Stamens 2, anther-cells confluent Lentibulariaceas. 



(39) Ovary 1-celled, placenta 2, parietal Orobanchacese. 



Ovary 2-celled, placenta 2, axile, anthers 1-celled. Scrophulariacese, 



(Striga)* 



