122. W. EUPHORBIACEAE. 



Calyx lobes of male flowers not overlapping. 10. 



8. Stamens 3. Filaments united into a slender tube. 



24 SPIROSTACHYS. 

 Stamens 6 — 10. Filaments free. 9. 



9. Stamens 6 — 12, usually 10, 2 seriate peripheral. 



19 ADENOCLINE. 

 Stamens 6—60, central. Styles free. 20 GELONIUM. 



10. Styles united to the middle or beyond (mostly climbers). 11. 

 Styles free or united at base only. I4. 



11. Ovary 1 celled by abortion. 17 MACARANGA. 

 Ovary 3 celled. (Herbs or undershrnbs, usually climbing.) I2. 



12. Flowers in dense involucrate heads. 21 DALECHAMPIA. 

 Flowers in racemes or spikes. 13. 



13. Stamens 30 or more. 22 CTENOMERIA. 

 Stamens normally 3. 23 TRAGIA. 



14. Filaments repeatedly branched. 18 RICINUS. 

 Filaments not branched. 15. 



15. Herbs with twining stems. Stamens 30 — 60. 



22 CTENOMERIA. 

 Trees, shrubs, or erect herbs. 16. 



16. Male calyx usually 3 lobed, open in bud. Stamens 2 — 3. 



25 SAPIUM. 

 Calyx closed in the bud. 17. 



17. Anther cells adnate laterally to a connective throughout their 



length, short, or dorsifixed. 18. 



Anther cells distinct, free or almost free, attached to the fila- 

 ment by their base or apex only. 19. 



18. Styles very long. Stamens usually 8. 16 ALCHORNEA. 



Styles short, stout. Stamens usually 2 — 3, rarely numerous. 



17 MACARANGA. 



19. Stamens numerous, 15—30. Styles plumosely laciniate. 2O. 

 Stamens few, 3 — 8. Styles undivided. 2L 



20. Buds perulate. Capsule 2 or 1 coccous, seldom 3 coccous. 



12 ERYTHROCOCCA. 

 Buds naked. Capsule 3 coccous. 



13 MICROCOCCA. 



21. Anther cells stipitate, plainly separate, oblong or linear, flexu- 



ous or twisted. Stamens usually 8. 15 ACALYPHA. 

 Anther halves contiguous, at length spreading, globose. 



Stamens Z—1. 14 LEIDESIA. 



22. Sepals of male flowers valvate in bud. 3 BRIDELIA. 

 Sepals of male flowers imbricate in bud. 23. 



23. Petals present in male flowers. 4 ANDRACHNE. 

 Petals absent in male flowers. 24. 



24. Flowers in slender, catkin-like spikes. 8 ANTIDESMA. 



Flowers pedicellate in axillary fascicles or solitary. 25. 



