SYNANTHEREJl. 371 



TV. 74. ; [Pennsylvania I to Uruguay I ; Egypt I to Natal ; Arabia !, Mesopotamia I, Trans- 

 caucasia! and Northern China I to the East Indies ! and trop. Australia I]. 



28. BORRICHIA, Ad. 



Head radiate : the ray-flowers ? , short. Involucre hemispherical, imbricate : exterior 

 row foliaceous. Receptacle paleaceous ; palese oblong, rigid. Style-branches suboylindricial, 

 bluntish, hairy ft'om the summit to near the base. Achenia of the disk compressed-4-gonaI : 

 crown short, 4-toothed. — Maritime shrubs ; leaves opposite, sessile, leathery ; heads solitary, 

 feduncled, terminal, yellow. 



, 95. B. axborescens, DO. Silvery-sericeous or glabrescent ; leaves spathnlate or lan- 

 ''^ceolate, mucronulate, quite entire ; involucre adpressed ; palece spathulate-oblong, mucro- 

 nate. — Buphthalmum,. L. B. frutescens jamaicense, i., Sie. Ohs. Borr. argentea, BG. : 

 the common "West Indian, silvery form, but the glabrous one of DC. is no variety, glabrous ' 

 and silvery leaves occurring on the same stem. 4—1' high ; variable in the ligules obovate 

 or oblong, the exterior scales of the involucre ovate or oblong, as long as the inner ones or 

 shorter and somewhat spreading. — Hab. Bahamas!, Swains., Turk Islands !, ^a/»!«ra. ; 

 Jamaica I, Macf., Wils., March, on calcareous rocks and in dry places along the coast ; An- 

 tigua !, Wulhohl. ; [Bermudas, Key West ; Cuba ! to Gruadeloupe 1 and Peru]. 



29. WEDELIA, Jaeg. 



Head radiate (rarely discoid) ; the ray-flowers $ . Involucre 2-serial, exterior foliaceous, 

 interior scaly. Meceptacle slightly convex, paleaceous. Style-branches hispidulous above, 

 or from the summit nearly to the base. Achenium biconvex, or angular : crown unequally, 

 lobed or dentate. — Herbs or shrubs j leaves opposite ; heads peduncled, terminal and axil- 

 lary, solitary or ternate, yellow. 



Sect. 1. Stemmodon. — Idgules 3-dentate. Style-branches bluntish, cylindrical, hispidu- 

 lous to the middle. Achenium muricate, glabrous. — Creeping, aromatic herbs, with as- 

 cending branches. 



96. W. carnosa, Bich. Glabrescent ; leaves sessile, cnneate-oblong or obovate, 

 .coarsely few-serrate, or trilobed ; peduncles solitary in the axils, equalling or exceeding the 

 leaves, pubescent ; involucral leaves oval-oblong, as long as the disk, sc^es shorter; ligules 

 shortly exserted, obovate ; achenia of the ray trigonal-ovoid, bluntish at the ha.se, muri- 

 cate: crown short, multidentate-repand. — S/. if. 155./. 1. — Silphium trilobatum, i. W. 

 crenata. Rich. — ^Spithameous, from a long-creeping, stoloniferous base ; leaves triplinerved, 

 variable, l"-3" long ; disk-flowers much papillose at the lobes ; palese oblong-lanceolate, 

 acute.— Hab. Bahamas!, Swains.; Jamaica!, all coll:, in wet places; Dominica!, Imr., S. 

 Vincent !, Guild. ; Trinidad I, Or. ; [Cuba ! to French islands !, Sieb. Mart. 199 ; Panama ! 

 to Pernambuco!]. 



97. 'VV. gracilis. Rich. Stems slender, pilose, 1-few-headed ; leaves subsessile, cnneate- 

 oval, blunt, inciso-few-serrate or trilobed, ciliate, glabrescent ; peduncles much longer than 

 the leaves, pilose, usually from the uppermost axil j involucral leaves obovate, as long as 

 the disk, scales shorter ; ligules shortly exserted, oblong or obovate-qnadrate ; achenia of 

 the ray obovate, tapering at the base, biconvex with an argute margin, of the disk subcom- 

 "pressed, fusiform-stipitate, both kinds muricate-tubereled : crown produced, with a lobed, 

 membranaceous limb. — Spithameous, ascending from the creeping, filiform roots, the stem 

 more delicate than in the preceding ; leaves 10"'-12"' long and often as broad, triplinerved ; 

 pednncles 3"-4" long ; heads 8'" diam. ; palese oblong-linear, bluntish or acute ; achenia 

 2'" long, smaller than in the preceding; those of the disk tapering from the middle into their 

 slender stalk. — Hab. Jamaica!, Jl., Wullschl., S. Andrews near Kingston, S. Anns; Man- 

 chester. 



Sect 2 Cyathophora, DC. — Ugules 'ii(r?>) -dentate. Style-branches acute, hispidulous 

 frora the summit nearly to the base. Achenium pnberulous.—Saihxous shrubs, or suf- 

 frutescent herbs ; peduncles terminal. 



98. W. caracasana, DC. Shrubby, scabrous with hispidulous appressed down; 



