Nidorella'] lxxiii. composite (Oliver and hiern). 311 



Xlfozamb. Distr. Cabaceira and Sena, Dr. Peters/ Shupanga and Shire valley, 

 Drs. Kirk.' and MelUr ! M'geta, Zanzibar, Speke and Grant .' 

 Nearly allied to N. auriculaia, DC. of the Cape. 



22. CONYZA, Less. ; Benth. et Hook. f. Gen. PI. ii. p. 283. 



Capitula heterogamous, disciform ; onter florets $ 2- oo-seriate, of 

 disk all or most hermaphrodite. Involucre campan'ulate ; scales 2- oo- 

 seriate, imbricate, narrow-linear or lanceolate, outer smaller. Recep- 

 tacle plane or convex, naked or foveolate and fimbrilliferous. Corolla 

 of $ florets filiform, narrow-tubular, ligule or minute; of 5 florets 

 tubular, slightly dilated above, 5-toothed. Anther-base obtuse, entire. 

 Style-branches usually narrow, with lanceolate appendix. Achenes 

 small, compressed. Pappus 1-seriate (or rarely 2-seriate). — Herbs or 

 more rarely shrubs. Leaves alternate, entire dentate or pinnatifid. 

 Capitula small or of medium size, usually cymoee corymbose or vari- 

 ously panicled, yellowish (or outer florets whitish). 



A considerable weed-like genus widely difliised throughout the warmer regions of 

 both hemispheres. Most of the following species are peculiar to this Flora. 

 Ligule of $ florets. obsolete. Leaves (upper) amplexi- 

 caul. 

 Scales of involucre narrow, linear-lanceolate, acute, 

 greenish, usually about ^ in. broad. 



Leaves glabrous, finely acuminate I. C. persicafolia. 



Leaves usually more or less hairy, not narrowly acuminate. 

 Leaves entire, dentate or loosely pinnatifid. 

 Heads usually \-^ in. diam. 



Shrubby, spinose 2. C. spinosa. 



Unarmed herbs. 



Shortly hirsute. Leaves oblong or ovate- 

 lanceolate, toothed or entire . i . . 3. C. Hochstetteri. 

 Setulose or glabrate. Leaves ovate or 

 ovate-lanceolate, narrowed below mid- 

 dle, sferrate 4. C. Steuddii. 



Puberulous or glabrate. Leaves oblanceo- 



late or linear, toothed 6. C. abyssinica. 



Puberulous. Leaves linear or spathulate- 



oblong, entire 6. C. Vatkeana. 



Heads |-| in. diam. Leaves toothed or pinna- 

 tifid. 



Pedicels short. Achenes thinly pubes- 

 cent 7. C. (sgt/ptiaca. 



Pedicels ranging up to 1^ in. Achenes 



glabrous 8. C. senegalensia. 



Leaves lanceolate, amplexicaul, acutely incised . . 9. C. pectinata. 

 Scales of involucre oblong or lanceolate, often pur- 

 plish., ^ in. broad more or less. 

 Tufted herb of "1-2 in. Inner involucral scales 



acuminate. Achenes pilose 10. C. najta. 



Herb of J-^ ft. Involucral scales not acuminate, 



pubescent. Achenes pilose 11. C. variegata. 



^-2 ft. Involucral scales obtuse, pubescent. 



Achenes glabrate 12. C7. Gouani. 



1-2 ft. or more. Involucral scales acute or acu- 

 minate, pubescent. Achenes shining, glabrate 13. C. clarenceana. 

 Slender, 2 ft. or more. Involucre glabrous, scales 



