r.'XXlI. EUPHORRIArE/F, (bROWN AND IIUTrHINSOX), 443 



**Ovavy or fomalo flowor, when present, witli a enp-like calyx 

 at its base, not enclosed in an involncre, but half 

 surrounded by 4 involucres formed of free bracts, 

 containinii- tlie stamens supjiorted on the -4 lohrs of an 

 oi)en hand-like common involucre which spreads on one 

 bide of it. « 7. Amuosti;maia. 



TuriiE 11. BuxeaD. Pei-ianlh cuf^x-like. IScfjiutiila imbvicale or (in some 

 extra- African s^^ccic.s) uhsent. tSLamens opposite the segments, in the Africnn 

 genera 4 or 6. Ovules 2 in each celt, rarely solitary ; raphe dorsal. Stt/les 

 vndivided or slightly hijid. Cotyledons various. Shrubs or trees with opposite 

 entire leaves [African species). 



Stamens 4, opposite tlie segments 8. Buxus. 



Stamens G, two single opposite the outer segments, four 



in pairs opposite the inner 9. XoTOBrxus. 



Tribe III. Phyllantheae. Sepals valval e or imbricate in bud, in 1-2 

 series. Petals when present small and scale-like. Stamens in 1-2 series, the outer 

 opposite the sepals, rarely indefinite in the centre of the Jlotoer. Ovules 2 in 

 each cell (in Martretia the ovary is 2-celled, each cell partially divided by a false 

 septum between each oride), collateral and usually contigxious ; caruncle usually 

 conspicuous ; raphe ventral. Cotyledons much broader than the radicle. In- 

 florescence various, a.villary, rarely paniculate and terminal. 



*Sepids of the male flowers vnlvate in bud. 



Flowers in axillary fascicles or glomerules, rarely in 



spicate clusters or short racemes; i)etals present, 



very rarely absent; ovary-cells not divided by 



false septa. 



Fruits drupaceous; ovary 2-celled; tertiary nerves 



of the leaves usually parallel . . . .10. Bridelia. 

 Fruits capsular; ovary 3-celled ; tertiary nerves 



usually not parallel 11. CLEiSTAXTHrs. 



Flowers in racemes ; petals absent ; ovary-cells par- 

 tially divided by a false septum . , , .24. Martretia. 

 **Sepals of tl»e male flowers imbricate in bud. 

 Leaves digitately compound. 



Leaves opposite ; leaflets stalked . . . .12. Oldfieldia. 

 Leaves alternate; leaflets sessile or subsessile. 



Fruits dehiscent; leaflets 1-3 .... 13. Abistogeitonia. 

 Fruits indehiscent; leaflets 5-7 .... 14, FaiVjKUSa. 

 Leaves simple, 

 t Petals present in tlie male flowers. 



Inflorescence paniculate ; capsule loculicidal. 

 Panicles terminal and clustered at the apices of 

 the shoots; disk in the male flowers con- 

 sisting of separate glands . . , .15. Meqabaria. 

 Panicles axillary; disk in the male flowers 



cupular 16. Centroplacus. 



Inflorescence spicate, racemose or fasciculate. 



Stales absent; stigmas sessile, thick, entire . 17. Aaianoa. 

 Styles well developed, usually divided, 



Male flowers in spikes or racemes . . 2(y. TllECACOHis. 



Male flowers in a,\illary fascicles. 



