302 Lxxiii. composite: (oliver and hiern). [Mikania. 



Wile Ziand. Abyssinia, Dr. Both ! 

 Xiower Guinea. Congo, Chr. Smith! Loango, Soyaux ! 



Mozamb. Distr. Luabo River, Dr. Kirk ! Murchison Falls, Shire, Dr. Meller ! 

 Native name, •* "Wedwedwi." Zambesi, Dr. Peters! Zanzibar Coast, HUdebrandt! 



13. MIOROTRIOHIA, DC; Benth. et Hook. f. Gen. PI. ii. 260. 



Capitula hemispherical or broadly campanulate, outer florets $ , of 

 the disk \^ . Involucral scales 2-3-8eriate, membranous-margined, 

 nearly equal, shorter than the florets. Receptacle convex, naked. 

 Corolla of $ fl. tubular, mouth denticulate, of ^ fl. campanulate, nar- 

 rowed at base, shortly 4-5-fid. Anther-base obtuse, apex shortly 

 produced, oblong-lanceolate. Style-branches with lanceolate acute 

 tips. Achenes subterete or slightly compressed ; pappus of few cel- 

 lular-subulate denticulate very caducous setae. — Herb or undershrub, 

 more or less pubescent. Leaves alternate, dentate. Capitula small, 

 many-flowered, yellow. 



Confined to Tropical Africa. 



1. SIS. Perrottetll, DO. Prodr. v. p. 366. A difiuse much -branched 

 pubescent or puberulous annual, varying to 1 ft. or more in height. 

 Leaves obovate, obtuse, cuneately narrowed into the petiole, coarsely 

 toothed above, ^1^ in. long, ^1 in. broad ; petiole of lower leaves 1 

 in. or more, upper shorter. Capitula ^-^ in. diam., subsessile or 

 shortly pedunculate, in small terminal or subterminal clusters. Invo- 

 lucral scales oblanceolate or linear, 2-3-seriate, subequal, rather acute, 

 cellular- dentate, outer loosely pilose. Achenes thinly scattered with 

 short spreading minutely glochidiate setse, subterete or slightly com- 

 pressed. Pappus as described above. 



Upper Guinea. Senegambia, Heudelot ! Nigritiana, Barter ! 



srortli Central. Monbuttu-land, Schweinfurth ! 



XrUe Iband. Bongo-land, Schweinfurth! 



We have not seen authentic specimons of M. Perrottetii, and some doubt attends 

 our identification, especially that Be Candoll6 I.e. describes this species, gathered by 

 Perrottet, as sessile-leaved, flowering extremities leafless, 1 -headed, and the achenes 

 turbinate. 



14. DICHROCEPHALA, DC. ; Benth. et Hook. f. Gen. 

 PI, ii. p. 260. 



Capitula heterogamous globose or disciform, many-flowered, outer 

 $ 00- seriate, of the disk § . Involucre inconspicuous, scales subbi- 

 seriate, subequal, membranous-margined. Receptacle convex columnar 

 or turbinate, naked. Corolla of $ fl. rotate-campanulate 3-4-fid or 

 tubular dentate ; of § fl. tubular dilated above, 4-5-dentate, or cam- 

 panulate constricted below. Anther-base 2-dentate. Style-branches 

 flattened with lanceolate or ovate appendix. Achenes compressed ; 

 pappus (or of § fl. very minute).—- Ajinual herbs. . Leaves alternate, 

 dentate or lyrate-pinnatifid. Capitula small with inconspicuous invo- 



