m 



CXXII. EUPHORBlACEvE (pKAIN AND BROWn). 



Ch^tocaepus. 

 Gelonium. 



Hamilcoa. 

 Pllkenetia. 



DALECUAMI'IA. 



Neoptcxoco-ma. 

 Tkagia. 



Filaments connate into a column 

 crowned by a rudimentary ovary ; 

 capsule echinate or tubercled; 

 glomerules axillary . . .70. 

 Filaments free ; rudimentary ovary ; 

 capsule smooth ; glomerules leaf- 

 opposed or extra-axillary . .71. 

 Flowers racemose ; anthers sessile or 

 nearly so ; capsule smooth ; rudimen- 

 tary ovary ; pedicels thickened up- 

 wards ...... 77. 



If Styles connate into a stout column, and con- 

 tinuous with body of carpels. 

 Ovary 4-carpellary ; stamens 8-40 . . 72. 



Ovary 3-carpellary. 



Flowers in dense involucratc heads; stamens 



20-30 73. 



Flowers racemose or apicate. 



Stamens inimerous ; femnk' flowers 

 apical. 

 Male calyx 3-5-fid ; rudimentary 



ovary 74. Pycnoco.aia. 



Male calyx 2-tid ; rudimentary ovary 



present . . . , . 



Stamens 3; female tlower.s basal . 



**Male calyx in bud open, )iot covering the stamens 



completely. 



Ovary 1-3-celled ; fruit small, indchiscent or 



capsular. 



Flowers racemose ; stamens 15, 18 or 21, free 



anthers nearly sessile; male calyx-lobes 



imbricate; fruit l-oelled, iiuleliiscent ; 



dioecious 78. Plagiostyles. 



Flowers spicate : stamens 3 or fewer. 



Stamens monadelphous ; spikes dense, 

 lateral ; fruit ca])sular ; mnna'cious. 

 Spikes ovoid, subcapituliform ; male 



calyx-lobes imbricate . • . 79. 



Si)ikes subcylindric; male calyx-lobes 

 valvate . , . . . .80. 



Stamens free ; spikes rather lax. 



Seeds stroi)hi()late ; spikes terminal or 

 both terminal and axillary or lateral; 

 monoecious . . . .81. SEBASTiAyiA. 



Seeds cstrophiolate. 



Spikes terminal ; moncecious . . 82. 



Spikes lateral ; diiecious . . . 83. 



Ovary 5-20-celled ; fruit larijre, capsular; flowers 

 spicate; spikes terminal; stamens 8-20, 

 monadelphous; mouo'cions . , , . 84. IIri{A. 



MAI'KOUXEA. 

 SriKOSTACUYS. 



Sapium. 

 exccecaiiia. 



J. STENADENIUM, Pax in Engl. Julub. xxx. 343. 



Apparent flower consisting of a short tubular or cup-like involucre 

 open on one side to about tlie middle, formed of A lobes connate at their 



I 



