374 SYNANTHERE^. 



1-3, minute). — Our form has short, glabrous achenium-beaks, truncate at the summit : in 

 o the beak is hispid and half as long as the achenium. Achenia 6"'-8"' long. — Hab. Tri- 

 nidad !, Cr. ; [Venezuela ! ; a from Cuba and Mexico ! to Brazil !]. 



34. VERBESINA, Z. 



Head radiate, rarely discoid : the ray-flowers ? . Involucre 2-several-serial. Receptacle 

 convex or flat, paleaceous. Style-branches puberulous above, with a conical appendage. 

 Achenium vertically flat-compressed, 2-awned, often winged on the margin. — Herbs or 

 shrubs ; tertiary leaf-veins often pellucid. 



Sect. 1. Verbesinaria, DC. — Awns of the achenium straight, subequal. 



108. V. gigantea, Jacq. Shrubby; branches naked, striate-cylindrical, glabrou9, pu- 

 bescent at the summit ; leaves alternate, pinnatipartite (or the uppermost subentire), gla- 

 brescent above, pubescent beneath : segments oblong, acuminate, few-dentate or entire : 

 petiole winged, not decurrent ; heads campanulate, in compound corymbs : ray few-flowered, 

 white (or none) ; involucre 2-3-serial : scales lanceolate, pubescent, exterior shorter ; palea; 

 convolute, oblong, mucronulate-bluntish, ciliate above ; achenium obcordate, broadly winged, 

 with the wing pale, ciliate : awns erect, equal. — Jacq. Ic. Mar. t. 175. — V. pinnatifida, Sw. 

 {non Cav.).— 10-12' high ; inferior leaves 10"-16" long; head 4"' long, 20-1 2 -flowered. 

 — Hab. Jamaica !, all coll., in the mountains ; Dominica !, Imr. ; [Guadeloupe !; Panama !]. 



Sect. 2. Hamulium, Cass. — Awns of the achenium unequal, the longer uncinate 



at the top. 



109. V. alata, L. Herbaceous, stoloniferous at the base, hispidulous or glabrescent; 

 stem winged by decurrent leaves ; leaves alternate, obovate or spathulate-lanceolate, un- 

 equally dentate or dentate-repand, contracted at the base ; heads subsolitary, long-peduncled : 

 ray orange, subincluded ; involucre 2-serial : scales lanceolate, exterior longer ; paleae con- 

 volute, linear, acuminate ; achenium obovate, broadly winged, with the wing pale, ciliate ; 

 uncinate awn twice as long as the straight one. — Stem l'-2' high ; leaves 4"-2" long ; head 

 4'" diam. — Hab. Jamaica!, all coll., a weed ; [Cuba!, Guadeloupe !; Mexico to Guiana]. 



35. CHtENOCEPHALUS, Gr. {nov.gen.). 



Head discoid, homogamous : flowers spreading from each other. Involucre 1 -serial. Re- 

 ceptacle minute, paleaceous. Corolla curved above the base, 5-dentate. Anthers jointed 

 with the filaments : connective thickened towards the joint and callous below the cells. Style 

 with a basilar tumour : branches hispidulous above, with a bluutish point. Achenium ver- 

 tically compressed, with keeled facets, 2-awned, narrowly winged. — High shrubs ; leaves 

 alternate ; heads corymbose, in a terminal, fastigiate panicle : its inferior peduncles 

 axillary. 



Salmea curviflora, R. Br., if a congener, would be distinguished from our species by "one 

 of the fruit-awns transformed into a wing." The true Salmea, though nearly related, have 

 an imbricate involucre, straight corolla?, the anthers more distinctly tailed, the connective 

 not callous at the base, and opposite leaves. 



110. C. petrobioides, Gr. 20' high ; branches cylindrical, striate, slightly puberu- 

 lous ; leaves early glabrous, spathulate-oblong, mucronate or bluntish, tapering into a short 

 petiole or subsessile, dentate-serrate or remotely serrulate-repand, smooth above, with pro- 

 minent, costate veins beneath, 8"-3" long, 3"-l" broad, uppermost decrescent ; pauicle 

 hispidulous, 6" diam. ; heads 6'" diam., 12-16-flowered; involucre recurved, shorter than 

 the exterior paleaj -. leaves linear, blunt ; palese convolute around the flower, oblong, blunt, 

 striate, glabrescent, 3"' long ; corolla-tube cylindrical, dilated at the base : indexed limb 

 5-fid to \, with oblong-linear lobes ; anthers minutely sagittate : cells filiform, narrower at 

 the base than the callous connective ; style-tumour ovoid, glabrous : branches revolute, ex- 

 serted ; achenium cuneate-obovate, hairy or glabresent, black, 2£"' long : awns straight, 

 proceeding from the angles, slightly unequal, 1"'-1£'" long, decurrent into the very narrow, 

 pale wing, which lines the margin of the achenium. — Hab. Jamaica !, Pd., Wullschl., Man- 

 chester, on Martin's hill, Huntly. 



