1^[ 142. RfBIACBAE. 



9. Corolla with contorted aestivation. Flowers 4 merous 



15 PAVETTA. 

 Corolla valvate. 16 PSYCHOTRIA. 



10. Style arms 2, long, filiform, hairy. U. 

 Style 1 with stigma 2 lobed, lobes obtuse, linear or spathulate 



or styles 2. Stigmas capitate. I2. 



11. Flowers axillary, or, if not, then as usually dioecious. 



18 ANTHOSPERMUM. 



Flowers in terminal or terminal and lateral cymes or panicles. 



Hermaphrodite. 17 GALOPINA. 



12. Stipules not like leaves. Leaves opposite. I4. 

 Stipules similar to leaves. 13. 



13. Corolla 5 parted. Fruit fleshy. 23 RUBIA. 

 Corolla 4 parted. Fruit dry. 24 GALIUM. 



14. Ovary 3 celled. Style 3 cleft. Fruit separating into 3 nutlets. 



22 RICHARDSONIA. 

 Ovary 2 celled. 15. 



15. Strand plant. Leaves fleshy. Fruit indehiscent, corky. 



19 HYDROPHYLAX. 



Not strand plants. Leaves not fleshy. Fruit separating into 



mericarps. 16. 



16. Fruit opening by a lid. Calyx with 2 teeth longer than others. 



21 MITRACARPUS. 

 Fruit opening by one longitudinal slit. Calyx with 2 — 4 lobes, 

 sometimes with intermediate accessory teeth. 



20 SPERMACOCE. 



17. Corolla valvate. Herbs or undershrubs. 18. 

 Corolla imbricate, usually contorted. Shrubs or trees. 19. 



18. Calyx lobes unequal. Style arms papillose on both surfaces. 



Flowers cymose. 3 PENTAS. 



Calyx lobes equal or nearly so. Style arms smooth on outer 

 surface. Flowers in terminal or axillary panicles. 



2 OLDENLANDIA. 



19. Corolla imbricate, but not contorted. Flowers in dense globose 



heads. Ovary 2 celled. Style simple. 



1 CEPHALANTHUS. 

 Corolla with contorted aestivation. 2O. 



20. Ovary 1 celled, but placentas projecting towards centre. 



Flowers usuallv solitary. Style 1. Stigma 2 dentate. 



7 GARDENIA. 

 Ovary completely 2 — 3 celled. 2I. 



21. Style more or less deeply cleft. Lobes erect or revolute. 



9 TRICALYSIA. 

 Style entire or shortly lobed or toothed at apex. 22. 



22. Inflorescences terminal or terminal and lateral. 23. 

 Inflorescences lateral. 25. 



