3. a. Inflorescence capitate, spicate or racemose. ... 4. 

 b. Inflorescence cymose or flowers solitary in the axils of 



the leaves 10. 



4. a. Inflorescence racemose, axillary . . 6. Petr.«a p. 25. 



b. Inflorescence spicate 5. 



c. Inflorescence capitate 9. 



5. a. Spikes dense, short 6. 



b. Spikes more or less elongated 7. 



6. a. Fruits drupaceous, with fleshy exocarp, and one 2-seeded 



or two 1 -seeded pyrenes . . . .2. Lantana p. 10. 



b. Fruits capsular, with dry exocarp and splitting up into 



2 one-seeded cocci 3. Lippia p. 15. 



7. a. Fruits capsular, bivalvate. . . 28. Avicennia p. 339. 



b. Fruits drupaceous; pyrenes 2»seeded 8. 



c. Fruits splitting up into four 1 -seeded cocci 1 . Verbena p. 9. 



8. a. Pyrenes 4 7. Duranta p. 27. 



b. Pyrenes 2 5. Priva p. 23. 



9. a. Heads with 3—4 involucral bracts 27. Congea p. 336. 

 b. Heads without involucral bracts 28. Avicennia p. 339. 



10. a. Inflorescences terminal, simple or composed and often 



panicled; the small inflorescences being sometimes attached 



at rather wide intervals (Premna latifolia Roxb.) . 11. 



b. Inflorescences axillary, simple, or flowers solitary in the 



axils of the leaves 22. 



11. a. Flowers small, 0.5—1 cM. long; corolla-tube short, 



relatively rather broad, cylindrical or nearly so .12. 



b. Flowers larger, 1.5—12 cM. long; corolla-tube long, 



relatively rather narrow, at least near the base, cylindrical 



or infundibuhform and very wide near the throat . 20. 



12. a. Leaves composed 13. 



b. Leaves simple 16. 



13. a. Calyx not enlarged in fruit 14. 



b. Calyx with enlarged, membranous lobes in fruit 



24. Petr^ovitex p. 323. 



14. a. Corolla 4-merous .... 16. Viticipremna p. 162. 

 b. Corolla 5-merous 15. 



15. a. Fruit capsular, indehiscent, 1 -celled, 1 -seeded 



12. Teysmanniodendron p. 97. 



