29(1 80. EUPHORBiACE^. [EupJiorUa. 



Cells of o vary 1-ovuled, 

 Flowers in terminal, unisexual cymes or with the 

 central flower female. Petals present. (Crotouece). 



Fruit capsular .* I7. Jatropha. 



Flowers in terminal, androgynous spikes. Males petali- 

 ferous. Females often apetalous. Filaments mflexed 

 in bud with the anthers reversed , ... ig. Croton. 



Flowers in axillary spikes or panicles, males petaliferous, 

 females often without petals^ 



Filaments straight in bud, anthers erect. 

 Sepals imbricate. Petals united. Fruit 



a drupe ... 19, GivoTiA. 



Sepals imbricate. Petals free. Fruit 

 a capsule. 



Sepals enlarged in fruit. 



Petals present in female 



flower ... c 20. Blachta. 



Petals absent in female flower. 21. DnroRPHOCALTX. 



Sepals valvate. Petals 4-8 22. Agrostistachys. 



Flowers in axillary spikes or panicles, apetalous. Calyx 

 of male closed in bud,membranou3, splitting into 3-5 

 concave sepals. 



Styles long, bifid or multifid. 

 Filaments free. 



Stamens 4 ; anthers 2-celled 23. Adenoohl^na. 



Stamens very numerous ; anthers 2-celled. 



Capsule drupaceous. Anther cells 



parallel 24. TsEwiA. 



Capsule dry. Anther cells globose, 25. Mallotus. 

 Stamens 1, few or many ; anther cells 

 3-4-locellate. 



Styles very long 2-fid 26. Cleidiojt. 



Styles entire ... 27. Macaranga. 



Filaments variously connate in bundles. 



Flowers dioecious in axillary spikes ... 2^. Ho:vroN'oiA. 

 Flowers monoecious in terminal panicles... 29. Eicinus. 

 Perianth single. Calyx of male minute and open in 

 bud or obsolete. (Hippomaneee.) 



Male calyx terete, 2-3-lobed 30. SAPiTirvr. 



Calyx terete, 3-partite 31. Exccecaria. 



1. EUPHORBIA, Linn. 



Herbs or shrubs often with much milky juice. Leaves of the 

 stem alternate^ with or without stipular spines or opposite and 

 stipulate, leaves of the flowering branches opposite. Flowers 

 monoicous, consisting of many male and 1 female flower in a small 

 perianth like involucre ; lobes with thick glands at the sinuses ; 

 glands often with a petaloid wing. Male fl. : 1, 2-celled anther 

 on an articulated filament. Female fl. : a stipitate 3-celled ovary in 

 the centre of the involucre ; styles 8, free or combined, simple or 

 2-fid. Capsule of 3, 2-valved cocci, separating elastically from a 

 columella ; cotyledons broad, flat. 



