CXXIL EUPHORBIACE.E (HUTCHINSON AND PRAIn). 445 



Stamens inserted around and at tbe 



base of the central disk . . 29. Drypetes. 



Stamens inserted on and amongst the 

 folds or lobes of the central disk, 

 lobes frequently surrounding the 

 base of each filament and re- 

 sembling a small fleshy perianth 30. Lingelshei.mia. 

 Disk outside or between the stamens, 



never centi-al ; styles usually present, 



more or less slender; fruit a capsule 31. Phtllanthls. 

 Rudimentary ovary present in the male 



flowers. 

 Flowers dioecious; rudimentary ovary 



deeply tripartite ; disk in the male 



flowers consisting of separate glands 32. Fluggea. 

 Flowers monoecious ; rudimentary 

 ovary lobed or subentire ; disk 

 in the male flowers saucer-shaped, 

 entire or undulately lobed. 



Stipules small, lanceolate, mem- 

 branous ; lobes of the disk oppo- 

 site the se])als; styles divided . 33. Cluytiandka. 



Stipules large and foliaceous, en- 

 circling the branchlet ; lobes of 

 the disk .alternate with the sepals ; 

 styles undivided , . . 34. ZlMMERMANNiA, 



Tribe IV. Galearleae. Sepah small, sUgldly imbricate. Petals present, 

 two or three times the size of the sepals. Stamens \-2,-fieriate (in the African 

 species 1—feriate), the outer ones opposite the sepah and alternate with the petals 

 as in Pbyllanthcu'. Ovule solitary in each cell as in Crotonea?. Rudimentary 

 ovary' present in the male Jlower. Flowers {in the African species) in axillary 

 fascicleff. 



Only tropical African genus . . , , , 35. Microdesmiji. 



Tribe V. Crotoneae. Sepals usually small, closed or valvate or imbricate 

 in bud, very rarely petaloid. Petals tvhen present free or connate, often longer 

 than the sepals. Stamens 1-2-seriate, the outer alternate with the sepals, or more 

 usually central, and few or indefinite, sometimes very many. Ovules solitary in 

 each cell. Cotyledons much broader than the radicle. Inflorescence various, often 

 racemose or spicate or paniculate. 

 Leaves digitately compound. 



Petals in male flowers ; calyx shortly lobed, 



open in flower ; fruit capsular . . .36. Hevea. 



Petals in male flower present and connate ; calyx- 

 lobes valvate ; fruit indehiscent . . .37. RlCiNODE>'DROX. 

 Leaves simple, when digitately lobed (iI/<:/w?'-%o^,i?ici««.v, 

 Macaranga) not divided to the base. 

 Petals in male flowers ])resent. 



Anthers inUexed in bud ; calyx-lobos valvate or 



slightly imbricate ; niale petals free , . 38. CrOTON", 



Anthers erect in bud. 



Male calyx-lobes imbricate. 

 Flowers paniculate or cymose. 



