XCVIII. EUPHOEBIACEiE 557 



C. Petals 0. Calyx campaniilate. 



Stamens 10, filaments free ..... Manihot (p. 582). 

 Antliers 5-10, adnate to a central column. . Hevka (p. 582). 



D. Petals 0, <? sepals imbricate. 



J fl. fascicled. 



Fr. smooth tardily dehiscent. Kesinous trees, 



stipules sheathing 28. Gelonium. 



Capsule ecliinato Oh^tocarpus (p. 582). 



S fl. m panicles or racemes . - . .29. Baliospermum. 



E. Petals. 0. 6 sepals or calyx-segments valvate. 

 (a) Twining slirubs. 



Ij. undivided, base cordate. 



$ calyx B-lobed, anthers 3, cocci not 



winged, sepals not enlarged in fr. . Cnesmone (p. 583). 

 $ sepals 4-5, stamens 8-30, cocci winged, 



sepals enlarged in fr. . . . Plukenetia (p. 583). 

 L. deeply lobed or trifoliolate, fl. in invo- 



lucrate head^ 30. Baleohampia. 



(5) Trees or erect shrubs. 



a. Filaments free, stamens 2 or 3, fl. in androgynous or unisexual spikes. 



$ calyx 2-3-lobed 31. S\pium. 



$ sepals 3, small 32. Excoscaria. 



jS. Filaments free, stamens 4, anthers 2-celled, 

 Filaments slender, anther-cells par- 

 allel, adnate to a thick connective 33. ADENOCHLinNA. 

 Filaments short, flat, anther-cells div- 

 aricate CcELODEPAS (p. 586). 



7. Filaments free or only united at base, stamens 6-00 , anthers 2-oelled. 

 L. alternate, anther-cells divaricate. 



Styles sliort, entire, densely plumose 34. Olaoxylon. 

 Styles fll if orm, with numerous slender 



branches 35. Acalypha. 



L. alternate, anther-cells contiguous, parallel. 



Back of cocci rounded . . - 36. Alchornea. 

 Back of cocci sharply keeled . . Coccogeras (p. 587). 

 L. alternate or opposite, anther-cells 

 globose or shortly oblong, widely 

 separated by the thick connective 37. Mallotus. 

 L. opposite, anther-cells contiguous, parallel. 



i. entire, fr, a drupe . . . .38. Teewia. 

 L. dentate or sinuately lobed, fr. a 



capsule 39. Ccclodiscus. 



6'. Filaments fi^ee, stamens 1-co , anthers 3-4-oelled. 



Styles entire 40. MACARANaA. 



Styles with 2-3 long filiform arms . . Cleidion (p. 592). 

 e. Filaments connate in bundles, stamens co. 



Fl. in terminal androgynous panicles , Bicinus (p. 593). 

 Fl. usually dioecious, in axillary spikes . 41, Homonoia. 

 Fl. monoecious, $ in axillary spikes, ? 



solitary Laseococca (p. 593). 



Position uncertain .... Sphyranthbra (p. 593). 



1. EUPHORBIA, Linn. ; FL Brit. Ind. v. 244. 



Mostly berbs, a few sbrabs or soft-wooded trees with flesby branches, 

 abounding in milky juic©, contained in continuous laticiferous tubes. L. of 

 tbe stem alternate, without stipules, or with stipular spines, those on the 

 flowering branches opposite. Fi. heads resembling single fl., consisting of a 

 calyx-like cup-shaped involucre, lobes 4r-5, alternating with broad fleshy glands, 

 enclosing 10-15 male and one central female fl. $ : one 2-celled, often didy- 

 mous anther on an articulated filament. ? : a solitary stipitate 3-celled 

 ovary, styles 3, free or combined, simple or 2-fid. Capsule separating into 

 three 2-valved cocci. Species over 600, absent only in the arctic zone. 



The species here described all belong to the Section EuphorMum with 



