CTX. ETJPnORBIACE^. 335 



3) cocci, wliich generally split into 2 valves, and break oiF 

 from a central, persistent columnar axis. Seeds albuminous ; 

 embryo central ; cotyledons usually flat or flattish, sometimes 

 leafy. — Trees shrubs and herbs, very varied in habit, frequently 

 with an acrid, milky juice. Leaves mostly alternate, with or 

 without stipules. 



Series 1. Uniovulate. Ovules 1 in each cell. 



Several monandrous male flowers and a solitary fe- 

 male together in a calyx-like, fleshy, 4-5-lobed in- 

 volucre (milky plants) 1. Euphorbia. 



Male and female flowers separate. 



Male flowers (at least) furnished with petals. 

 Stamens united in a central column. 



Stamens 10; petals longer than the calyx . 3. Jateopha. 



Stamens 5 ; petals short 4. Cluytia. 



Stamens free. 



Calyx 5-parted ; petals 5, clawed .... 5. Ceoton. 

 Calyx 2-parted, sepals horned ; petals 2 . . 6. Ceeatophoeus. 

 Male flowers without petals. 



Stamens many or very many (at least 50). 

 Stamens polyadelphous j filaments much- 

 branched 2. RiciNUS. 



Stamens monadelphous ; flowers clustered 



within two large leafy-veined bracts . . .13. Dalechampia. 

 Stamens free ; flowers not bracted. 



Calyx of both sexes 3-4-parted ; sepals 



entire 14. Claoxylon. 



Calyx of male 5-parted ; of female 6-7- 



parted ; the sepals pectinate-pinnatifid . 15. Ctengmeeia. 

 Stamens few, never more than 20. 

 Ovary 2-celled ; capsule 2-coccou3. 



Trees or shrubs, with long-petioled, round- 

 ish leaves 7. Mappa. 



Herbs, with narrow, subsessile leaves . .11. Seidelia. 

 Ovary 3-4-ceDed ; capsules 3-4-coccou5. 

 Stamens 2-3. 



Male-calyx 3-parted ; female 3-8-parted, 

 the segments pectinate-pinnatifid (twin- 

 ing, hairy halfshrubs) 10. Tragia. 



Male-calyx cup-like, crenulate ; female 

 3-toothed (trees and shrubs, with milky 



juice) 16. Stillingia. 



Stamens 8-16. 



Styles 3, divergent, coloured, multifid . 8. Acalypha. 



Styles 3, deeply 2-fid 9. Adenocline. 



Style 1, short and thick ; stigma 3-4- 



lobed 12. Plukenetia. 



Series 2. Biovulate. Ovules in pairs in each cell. 



Flowers furnished with petals. 



Calyx 5-fid ; the lobes thick, triangular, valvate in 



bud 19. Briedelia. 



Calyx 5-parted ; sepals villous, imbricate in bud . 23. Lachnostyles. 



