372 SYNANTHEREiE. 



leaves petioled, ovate-lanceolate, long-acuminate, remotely serrulate, triplinerved, less stri- 

 gose beneath than above ; peduncles ternate ; involucral leaves oblong-lanceolate, longer 

 than the disk ; ligules oblong, shortly 2-dentate, exserted ; achenium compressed-tetra- 

 gonal, smooth : crown short, denticulate.- Gymnopsis verbesiuoides, DC. f, ex specim. 

 Lockh.— Leaves 4"-3", petiole 5"'-3"' long ; heads 8"' diam.— Hab. Trinidad !, Lockh., 

 Cr. ; [Veraguas, Panama !, Venezuela]. 



99. W. bupb.thalmoid.es, Gr. Shrubby, scabrous with strigose down ; leaves pe- 

 tioled, ovate-lanceolate or lanceolate, acuminate, serrate or subentire : petiole hispid-cihate ; 

 peduncles solitary, as long as the uppermost leaves ; involucral leaves longer than the disk ; 

 ligules oblong, long-exserted ; achenia of the disk obloug-linear, biconvex, with an argute 

 margin, which is broader at the base, smooth, of the ray somewhat broader, obovate-oblong, 

 margined : crown short, lobed. — Anomostephium, DC. — Probably a common and variable 

 species, but the achenia in /3 and y are still unknown : in one instance I see triplinerved and 

 arch-veined leaves on the same branch. Leaves 5"-4" (-2") long ; heads 1£"-10"' diam. 



a. Leaves 1 -nerved, arch-veined, serrulate or subentire ; involucral leaves ovate-roundish, 

 blunt. 



$. antiguensis, Nichols, (sec. Wullschl.). Leaves broader, serrate, triplinerved and veiny; 

 involucral leaves elliptical, pointed. 



y. dominicensis. Leaves of a, but triplinerved ; involucral leaves elliptical-oblong, 

 pointed. 



Hab. Bahamas!, Swains.; Antigua!, Finl., Wullschl. (j8), Dominica!, Imr. (y), S. 

 Vincent !, Guild, (a, y) ; [Guadeloupe !, in arid places, a, y]. 



Of the other West Indian Wedelia, which probably all belong to Cyathophora, W.fru- 

 tescens, Jacq., has sessile or subsessile leaves, and will perhaps include W. calycina, Rich., 

 acapulcensis, Kth., and W. affinis and lanceolata, DC. ; W. reticulata, DC, has uninerved 

 leaves and a thickish vein-net beneath them ; W. ambigua, DC, broad, triplinerved, long- 

 petioled leaves : the disk in this and in W. reticulata exceeds the involucre ; in W. Siebert 

 (W. frutescens, Sieb. Mart. 201), from an imperfect specimen, the rays are included, and 

 the triplinerved leaves villous beneath. 



30. MELANTHERA, Rich. 



Head discoid, homogamous. Involucre 2-serial. "Receptacle convex, paleaceous. Style- 

 branches hispidulous above, acute. Achenium compressed-angular, crowned with several 

 awns. — Scabrous perennial herbs; stem tetragonal; leaves opposite, serrate, petioled, tri- 

 plinerved ; heads peduncled, single or ternate, white : prominent column black, with ter- 

 minal, white appendages. 



100. IKE. deltoidea, Rich. Leaves deltoid or slightly hastate ; exterior involucral 

 scales ovate (or ovate-obloug), blunt ; palea mucronate-acute. — Jacq. Ic. Rar. t. 583. — 

 Bidens nivea, Sw. Calea aspera, Jacq. M. Linnaei, Kth., Sieb. Mart. 202. — 2'-5' high ; heads 

 5"'-6"' diam. — Hab. Bahamas !, Swains. ; Jamaica !, Macf., M'Nab, Wils., Wullschl., a 

 common weed ; Dominica 1, Imr. ; Trinidad !, Sch., Cr. ; [Cuba ! and Mexico ! to Venezuela ! 

 and Ecuador !]. 



31. WTJLFFIA, Neck. 



Head radiate or discoid : the ray-flowers sterile. Involucre imbricate. Receptacle con- 

 vex, paleaceous. Style -branches hispidulous above. Achenium somewhat fleshy, compressed- 

 tetragonal, naked. — Scabrous shrubs, often scandent ; leaves opposite, serrate, petioled : in- 

 ferior vein-pairs more approximate to the leaf-base ; heads peduncled, axillary and ter- 

 minal, ternate or solitary, yellow. 



101. W. stenoglossa, DC. Branches subtetragonal ; leaves ovate-lanceolate or 

 ovate, acuminate, shortly cuneate at the base, minutely hispidulous ; involucre oppressed : 

 exterior scales ovate-lanceolate, bluntish, about half as long as the ray ; palese mucronate 

 at the incurved top, oblong. — W. capitata, Schultz Bip. / Tilesia capitata, Mey. Ess. ! — 

 Leaves 6"-4" long ; heads 1" diam. : exterior scales of the involucre 4"' long. — Hab. Do- 

 minica!, Imr., S. Vincent!, Guild.; Trinidad!, Sch. ; [Guiana! to Peru!]. 



102. W. havanennis, DC. Branches sub-6-goual ; leaves ovate-oblong or ovate- 



