Ganthium.'] Lxx. rubiace^ (hiern). I33 



Corolla-lobes obtuse 8. C. avomocarpum. 



Corolla-lobes acute 9. C. cumtijlorum. 



Corolla-lobes caudate-acuminate . . 10. C. caudatiflorum 

 Common peduncles ^ in. long ..... . U. G. horizontale. 



Pedicels paniculate. Usually unarmed. Flowers 

 4-5-merous. Disk hairy or glabrous. 

 Inflorescence zigzag, divaricately branched. Occa- 

 sionally spinous 12. C. discolor. 



Inflorescence spreading, 1 -fruited. Unarmed. . . U. C. oligocarpum. 

 Inflorescence subglobose, dense, not zigzag. Unarmed. 

 Fruits numerous. 



Style pubescent (except the variety) 14. C. Zanzibar icum. 



Style glabrous. 



Stigma calyptriform, much exserted. 

 Flowers 5-merous. 



Leaves narrowed at the base. 



Branches slender, terete. Lateral veins 



of the leaves about 4-6 pairs . . . 1 5. C. gracile. 

 Branches rather slender, subterete. La- 

 teral veins of the leaves about 7-9 



pairs . . . . • 16. a Heuddotii. 



Branches robust, angular. Lateral veins 



of the leaves about 7-8 pairs . . . 17. C. poh/carptm 

 Leaves rounded or hollowed at the base, or 

 nearly so. 

 Disk glabrous. 

 Glabrous. Branches erect-patent . . 18. C. qlabriflonm. 

 Hairy. Branches spreading . . . . 1 9. C. Cornelia. 

 Disk more or less hispid. 



Hairs on the leaves or branches pilose- 

 hispid. 



Branchlets hispid 20. C. hispidum. 



Branchlets glabrous . ..... . 2\. C. .<ietomm. 



Hairs on the leaves or branches short . 22. C. subcordatunt. 

 Glabrous except the inflorescence, or 

 nearly so. 

 Calyx-teeth hairy. 

 Leaves not reddish, but paler 



beneath 23. C congcnse. 



Leaves reddish on both sides when 



dry 24. C.mbens. 



Calyx-teeth glabrous 25. C.fatidum. 



Flowers 4-merou8. 



Tertiary veins of the leaves inconspicuous. 



Leaves turning neither red nor black in 



the dry state, glabrous, usually 



wedge-shaped at the base .... 26. C. Afzelianum. 



Leaves turning reddish in the dry state, 



not black. 



Pubescent. Leaves wedge-shaped at 



the base 27. C. Barteri. 



Glabrescent except the inflorescence. 

 Leaves rounded at the base or 

 nearly so. 



Calyx-tube hairy 28. C. nervosum. 



Calyx-tube glabrous or nearly so . 29. C. Mannii. 

 Leaves (young) turning black when dry, 



not reddish 30. C. lividum. 



Tertiary veins of the leaves conspicuous on 



