123 



RUBIACEAE. 



Key to genera. 



1. Shrub or tree 

 Herb, sometimes woody at base 



2. Flowers in stalked heads ... 

 Flowers not in stalked heads 



3. Ovules many to the cell ... 

 Ovules solitary in each cell 



4. Fruit a berry or drupe ... 

 Fruit a dry capsule or nut 



5. Flowers solitary, axillary 



Flowers in terminal panicles or 

 cymes ... 



6. Flowers in a terminal panicle ... 6. 

 Flowers in terminal corymbose 



cymes ... ... ... ... 4. 



7. Calyx lobes of outer flowers 



enlarged ... ... ... 12. 



Calyx lobes uniiorm 



8. Flowers large, solitary, corolla 



lobes 6 or more 

 Lobes of coroUa and calyx 5 



9. Flowers small, in dense axillary 



clusters ... ... ... 17. 



Flowers in panicles or cymes 



10. Bark white, corky, thick ... 13. 

 Bark thin, brownish 



11. Inflorescences aU terminal ... 14. 

 Inflorescences chiefly axillary ... 15. 



12. Flowers in many-flowered terminal 



cymes, corolla tube over 1-inch 

 long ... 

 Flowers small or few together ... 



13. Stigmas recurved ... ... 20. 



Stigmas erect, connivent... ... 21. 



14. Thorny shrub ... ... ... 24. 



Unarmed ... 



15. Tall twining shrub 29. 



Erect or creeping... 



16. Stipules bristly 31. 



Stipules without bristles ... 



17. Flowers involucrate ... ... 30. 



Flowers without an invohicre 



18. Flowers axillary ... 

 Flowers terminal ... 



19. Flowers in close fascicles ... 28. 

 Flowers in stalked or loose inflor- 

 escences 



20. Flowers in small stalked cymes ... 18. 

 Flowers in loose axillary cymes... 22. 



2. 



25. 



22. 



3. 



4. 



12. 



7. 



5. 



Thysanospermum (p. 



125). 



7. 

 Wendlandia (p. 125). 



Dunnia (p. 125). 



Mussaenda (p. 129). 



8. 



16. Gardenia (p. 131)i 



Diplospora (p. 132). 



10. 

 Adenosacme (p. 130). 



11. 

 Weber a (p. 130). 

 Randia (p. 131). 



13. 



14. 

 Ixora (p. 132). 

 Pavetta (p. 132). 

 Damnacanthus (p. 

 133). 



15. 

 Paederia (p. 134). 



16. 

 Serissa (p. 134). 



17. 

 Leptodermis (Tp. 134). 



18. 



19. 



21. 

 Lasianthus (p. 133). 



20. 

 Antirrhoea (p. 132). 

 Canthium (p. 132). 



