268 Lxxjii. coMPOsiT-ffi (OLIVER AND hiern). [Vemoma. 



Leaves membranous, pale but not silvery-silky 

 beneath. 



Involucral bracts verj acute 16. F. cinerca. 



Involucral bracts broader, not very acute . . . . 17. F. undulata. 

 Leaves subcoriaceous, silvery-silky beneath. 

 Upper surface of the leaves dark. 

 Le<ives lanceolate or ovate, acutely acuminate . . 18. F. Kraussu. 

 Leaves narrowly elliptical, less acute ; the lower 



ones obtuse .• . 19. F. Smithiana. 



Upper surface of the leaves silvery-silky .... 20. F. natalensis. 



Involucral bracts with recurved tips 21. F. uncinata. 



§ iii. Ctanopis. 

 Pappus uniseriate (caducous) or sometimes with minute per- 

 sistent coroniform outer row. 

 Erect herb. Leaves ovate. Achenes oblong with outer 



minute persistent pappus 22. F. Leopoldi. 



Decumbent herb. Leaves oblong. Achenes linear-oblong. 



Pappus single 23. F. misera. 



Shrubby. Leaves ovate-lanceolate. Achenes subturbinate, 



thickened above. Pappug single 24. F. MoramhalleB. 



Erect herb. Leaves ovate. Achenes oblong-ovoid. Pap- 

 pus single. Involucral scales green with white 



membranous margin 25. F. tnarginata. 



Pappus biseriate. 



Pappus rufous or tawny. 



Leaves tomentose beneath 26. F. zanzibarenais. 



Leaves glabrous or thinly pubescent beneath . . . . 27. F. wrticcBfolia. 

 Pappus white. 



Achenes pilose 28. F. plumhaginifolia. 



■ Achenes setulose. 



Capitula unilateral 29. F. Unionis. 



Capitula not unilateral. 



Albido-sericeous 30. F. Aschersonii. 



Dull-feruginous. 

 Involucral scales narrowly oblong subacute . . 31. F. karagtiensis. 



Involucral scales linear acute 32. F. Burtoni. 



Achenes glabrous 33. F. blumeoides. 



§ iv. XiPHOLEPIS. 



Achenes glabrous 35. F. BenthanUana. 



Achenes hairy. 



Pappus triseriate 36. F. Mdleri. 



Pappus duplex. 



Perennial. Leaves linear .37. V. fastigiata. 



Annual. Leaves wider 38. F. paiiciflora. 



§ V. Decaneurum. 

 Achenes glabrous or very nearly so. 



Pappus white. Leaves inciso-dentate 39. V.pteropoda. 



Pappus ferruginous. Leaves subentire or sinuate . . . 40. V. senegalensis. 

 Achenes hairy. 



Pappus sub-uniseriate 41. F. amygdalina. 



Pappus 2- 00 -seriate. 



Setae of the pappus compressed 42. F. guineensis. 



Setae of the pappus terete. 



Acaulescent 43. V. gerberaformia. 



Stems several or branched. 



Bracts of the involucre acute mucronate or apicu- 

 late, erect. 



