1350 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM 



Corolla closed in bud, the lobes valvate, imbricate, or contorted. 

 Corolla lobes valvate. 



Flowers spicate 10. ALSEIS. 



Flowers not spicate 11. BOUVARDIA. 



Corolla lobes imbricate or contorted. 



Calyx lobes dissimilar, one of them often expanded into a large white 



petiolate blade 12. CALYCOPHYLLUM. 



Calyx lobes all alike or nearly so, never expanded into a petiolate 

 blade. 

 Corolla symmetric, the tube slender, the limb 4 or 5-lobate. 



13. EXOSTEMA. 

 Corolla often asymmetric, the tube broad, often gibbous, the limb 



6 to 8-lobate 14. COUTAREA. 



Fruit fleshy. 



Corolla lobes valvate. 

 Inflorescence terminal. 



Inflorescence spikelike; leaves thin 16. DUQQENA. 



Inflorescence not spikelike; leaves coriaceous 17. ISEBTIA. 



Inflorescence axillary. 



Leaves finely lineolate between the nerves. 



Flowers in secund racemes 18. PLOCANIOPHYLLUM. 



Flowers not in secund racemes 19. SOMMERA. 



Leaves not lineolate 20. SABICEA. 



Corolla lobes imbricate or contorted. 

 Corolla lobes contorted. 

 Flowers perfect. 



Corolla somewhat irregular, curved in bud 21. POSOQUEBIA. 



Corolla regular, not curved in bud. 



Corolla tube villous within in both throat and base. .22. OENIPA. 

 Corolla tube villous in either the throat or base but not in both. 



24. RANDIA. 

 Flowers dioecious. 



Staminate flowers terminal 23. ALIBERTIA. 



Staminate flowers lateral 24. RANDIA. 



Corolla lobes imbricate. 



Cah'x lobes unequal, one of them foliaceous 26. OTOCALYX. 



Calyx lobes equal or nearly so, none of them foliaceous. 



Ovary 4 or 5-celled 26. HAMELIA. 



Ovary 2-celled 27. HOFFMANNIA. 



AA. Ovule one in each cell. 



Seeds pendulous, the radicle superior. 



Flowers in spherical compact heads; fruit dry 15. CEPHALANTHUS. 



Flowers not in spherical heads; fruit often fleshy. 

 Stamens inserted in the throat of the corolla. 



Fruit separating into 2 cocci at maturity 28. MACHAONIA. 



Fruit not separating into cocci at maturity. 



Corolla lobes valvate 29. CHOMELIA. 



Corolla lobes imbricate 30. QUETT ARD A. 



Stamens inserted at the base of the corolla tube. 

 Corolla lobes valvate. 



Inflorescence terminal 31. ERITHALIS. 



Inflorescence axillary. 



Flowers 5-parted; calyx lobes very short; flowers in racemes or 

 panicles 32. CHIOCOCCA. 



