SYNANTHEREJE. 377 



Sect. 2. Spilanthodia. — Heads ovoid, at length conical. Palea membranaceous. — 

 Leaves all, or superior alternate. 



121. I. atriplicifolia, R. Br. Stem erect, branched, scabrous-puberulous, and gla- 

 brescent ; leaves ovate or lanceolate, serrate, arch-veined, glabrous, contracted into the 

 petiole, which is auricled at the base : usually most alternate ; heads single, numerous ; re- 

 ceptacle conical-cylindrical ; palese 1 -nerved, exterior sterile ; appendages of the style- 

 branches setaceous ; achenium pubescent. — Spilanthes, L. I. Billber»iana, Less, is perhaps 

 an opposite-leaved form, with the uppermost leaves alternate : such a form occurs in Tri- 

 nidad, together with the alternate-leaved one. — 1-3' high ; heads 4"' long somewhat 

 pointed. — Hab. Trinidad !, Lockh., Cr., in moist savannahs ; [Cuba!; New Granada!. 



39. SYNEDRELLA, G. 



Head radiate : the ray -flowers ?: disk 5-1 2-flowered. Involucre few-leaved, foliaceous. 

 Receptacle minute, paleaceous. Style-branches with a hispidulous setaceous appendage. 

 Achenia of the ray compressed, winged, with the wing cut into flattish "spines, of the disk 

 linear, flat-convex, sub-3-angular, tubercled, 2(-3)-awned. — A diffuse, annual herb; leaves 

 opposite ; heads subsessile, glomerate-geminate in the axils, yellow. 



122. S. nodiflora, G. — SI. t. 154./. 4. — Verbesina, L. — Stem pubescent or glabrate ; 

 leaves ovate, triplinerved, pointed, cuneate at the petioled base, serrulate or subentire ; heads 

 4'" long. — Hab. Jamaica !, all coll., a common weed ; Antigua !, Wullschl., Dominica !, 

 Imr., S. Vincent !, Guild.; Trinidad !, Sch. ,- [Cuba ! and Mexico ! to Guiana! and Peru !].' 



40. CHRYSANTHELLUM, Rich. 



Head radiate : ray-flowers 9 . Involucre 2-1 -serial. Receptacle flat, paleaceous. Style- 

 branches shortly conical, hispidulous. Achenia of the ray cylindrical, callous, 3-furrowed 

 on each side, of the disk compressed, narrowly winged, with the wing dentate-ciliate, or all 

 compressed, naked. — Diffuse, annual, glabrous herbs; leaves alternate, lowest rosulate ; 

 heads peduncled, yellow. 



123. C. procumbens, Rich. Leaves cuneate, serrate, or cut, inferior petioled ; ray- 

 flowers 10-12, disk few-flowered; achenia of the ray cylindrical, of the disk compressed. — 

 SI. t. 155./. 3. Sw. Obs. t. 8./. 1. — C. Swartzii, Less. Verbesina mutica, L., Sw. An- 

 themis americana, L. — Procumbent ; heads small. — Hab. Jamaica !, Bancr., Mac/., Hist. 

 M'Nab, Wullschl., in pastures, uncommon ; [Cuba 1 to Brazil !]. 



Subseries 3. Tagetineee. — Disk-flowers hermaphrodite. Receptacle naked, flat. — Leaves 

 dotted with large, pellucid glands. 



41. PECTIS, L. 



Head radiate .- ray-flowers $ . Involucre 1 -serial. Corolla of the disk often unequally 

 5-dentate. Style hispidulous above and along its short branches. Achenium filiform, striate, 

 tapering at the base . pappus of scales, which usually are produced into awns, or of awns, or 

 of scabrous bristles. — Herbs, usually annual ; leaves opposite, 1 -nerved, often fringed with 

 bristles towards the base ; heads slender, yellow. 



Sect. 1. Pectidium, Less. — Pappus of a few, spreading, glabrous awns. 



124 P. punctata, Jacq. Annual, glabrous, slender, dichotomously branched above; 

 leaves linear, acuminate at both ends, dotted beneath, smooth on the margin : bristles few 

 at their base' short, or none ; heads long -pedicellate ; involucral scales 6 (-4), linear, blunt, 

 ,Wtpd with linear black glands; ray 5-, disk few-flowered; achenium hispidulous above; 



ns 2-4 subuliform.— Jacq. Amer. Pict. t. 196. SI. t. 149./. 3. Lam. III. t. 684.— 

 FMinifolia L (ex ic SI. and Lam. : non Less.). Pectidium punctatum, Lest.— 1'-3' high ; 

 leaves l'"-2"' broad.— Hab. Jamaica!, all coll., along the sandy seacoast; [Cuba! to 

 French islands ; Venezuela ! ; Galapagos !]. 



