282 Annals of the South African Museum. 



Key to the Sections. 



Leav r es woolly-pubescent or tomentose with whitish hairs, always 

 opposite ...... Sect. I. Incanae. 



Leaves papillous, scabrid, ciliate or glabrous, opposite or alternate. 

 Leaves densely papillous or scabrid with extremely short and 



thick hairs ..... Sect. II. Papillatae. 



Leaves ciliate or serrate on the margins only, rarely setose- 

 pilose with longish hairs on both surfaces Sect. III. Ciliatae. 

 Leaves glabrous and fleshy, sometimes warted, rarely pubes- 

 cent within the sheathing base . . Sect. IV. Glabratae. 



Key to the Species. 



Sect. I. Incanae. — Leaves woolly-pubescent or tomentose with ivhite or silvery 

 hairs, always opposite. Flower-heads solitary at the ends of the shoots. 

 Achenes villous. 



Involucral bracts acutely cuspidate-acuminate with some- 

 what spiny tips. 

 Bracts and pappus yellow . . . . . .1. acuta. 



Bracts and pappus purple ...... 2. Eenii. 



Involucral bracts obtuse or acute, not cuspidate-acuminate. 

 Involucral bracts glabrous outside, with very narrowly 



membranous hyaline glabrous margins . . .3. incana. 

 Involucral bracts pubescent or canons puberulous out- 

 side. 

 Pappus yellowish or straw-coloured. 



Leaves linear or linear-lanceolate, 2-'.\ mm. broad. 



Branches recurved and pendulous . . . !. Bolusii. 

 Branches divaricate. 

 Heads 4-5-flowered ...... 5. glauca. 



Heads many-flowered . . . . .6. cinerea. 



Leaves ovate or oblong-ovate, S -10 mm. broad . 7. ovalifolia. 

 Pappus purplish or reddish-brown. 



Pappus purplish ....... 8. erythrochaeta. 



Pappus reddish-brown ...... 9. qninqueflora. 



Sect. II. Papillatae. — Leaves densely papillous or scabrid all over the surface 

 with very short hairs, opposite or very rarely alternate. Flower-heads solitary 

 or rarely corymbose. Achenes villous or pubescent and. glandular. 

 Heads solitary at the ends of the shoots. 



Involucral bracts with usually very wide and almost 

 transparent margins. 

 Leaves oblong-lanceolate or slightly oblanceolate, 



8-11 mm. long 10. membranacea. 



Leaves linear, 2-4 mm. long . . . . .11. beckioides. 



Involucral bracts not or only slightly narrowly mem- 

 branous on the margin. 



