374 Lxxni. coMPOSiTiE (oliver and hiern). [Sclerocarpus, 



occasionally opposite simple leaves and yellow terminal capitula, soli- 

 tary or loosely cymosely panicled. 



A small tropical genus of both hemispheres. 



Heads solitary or nearly so, much overtopped by involucral 



bracts. Ray present. Paleae beaked 1. S. africanus. 



Heads panicled, bufc little exceeded by involucral bracts. 



Ray . , , . . 2. S.? discoideus. 



1. S. africanus, Jacq. Ic. PI. Bar. ii. p. 17, t. 176. Erect some- 

 what hispid-pilose annual, 1-4 ft. high; branches striate. Leaves 

 mostly alternate, ovate or ovate-lanceolate, acute, narrowed at the base 

 into the petiole, rather remotely serrate, 1-6 by ^-2^ in. ; petioles 

 ranging up to ^ in. Capitula sessile subsessile or pedunculate, terminal 

 or leaf-opposed, -J-f in. diam,, with foliaceous bracts at the base. 

 Peduncles ranging to 1^ in. Ray-florets 3 ; ray J-^ in. long. Fertile 

 florets about 10-12. Corolla elongated with narrowly lanceolate 

 lobes. Receptacle-paleaa cymbiform, J-^ in. long in fruit, gibbous and 

 with an elongated neck at apex, pubescent, wrapped round the fertile 

 florets. Style-branches elongated, slender. 



Upper Guinea. Niger, Barter! Ansell! Thonning. 



mie ]Land. Cordofan, Kotschy ! Abyssinia, Schimper ! Hildehrandt. Gallabat, 

 Schweinfurth ! 



Mozamb. Blstr. Tette, Kirk! 



Occurs also in JnJia in cornfields, etc. ; perhaps introduced. 



2. S.7 discoideus, {B&rdli. et Booh. f. Gen. PI. ii. p. 364;) Vathe 

 in Idnncea -sx-Kix. p. 495 (1875). A viscid-puberulous trichotomously 

 branched erect annual, 1-2 ft. high. Leaves all except the floral ones 

 opposite, lanceolate, subsessile, serrulate, about 1-2 by Jin., base broad. 

 Capitula J in. diam., pedicellate, arranged in a terminal leafy corym- 

 bose panicle. Pedicels J-IJ in. Bracts of the involucre 5-6, more 

 or less foliaceous exceeding the florets. Ray-florets wanting. Disk- 

 florets numerous. Corolla-tube short crass hairy ; limb short, lobes 

 4 roundly ovate. Paleaa of the receptacle cymbiform shortly 

 acuminate, glandular and hairy on the back, wrapped round the florets 

 but not the fruits. — Guizotia discoidea, Schultz Bip. in Schweinf . Fl. 

 ^thiop. p. 150. 



xrile Xiand. Abyssinia, Schimper! 



59. BLAINVILLEA, Cass. ; Benth. et Hook. f. Gen. PI. ii. 369. 



Capitula heterogamous radiate or discoid, outer florets $ . Involucre 

 ovoid or hemispherical ; scales slightly unequal outer herbaceous inner 

 paleaceous passing into the plicate scales of the receptacle. Ray or 

 outer florets with a small 2-3-dentate ligule or more or less regularly 

 2-3-fid. Anther-base obtuse entire. Achenes 3-cornered or biconvex ; 

 pappus of 2 or- 3 stout setae without intermediate scales. — Erect or 

 trichotomous scabrid herbs, with opposite or alternate ovate or lanceo- 

 late leaves. Capitula yellow or whitish, terminal, in loose cymose 

 panicles, often singly in the forks, 



