884, SYNANTHERE51. 



involucre 5"'-6"' long. — Hab. Jamaica !, Macf. ; Trinidad !, Lockh., Cr., in barren hills ; 

 [Cuba !, Haiti !, Texas !, Mexico !, Guatemala !, New Granada !, Venezuela !]. 



Tribe III. LIGULIFLORJE.— Corolla homogamous, all ligulate. 



56*. LAMPS ANA, T. 



Head 8-12-flowered. Involucre 1-serial, with accessory scales. Receptacle naked. 

 Achenium oblong-linear, flat-convex, striate, naked. — Herbs ; heads yellow, in branched 

 corymbs. 



155*. 1m. communis, L. Annual, glabrescent ; leaves dentate or inferior lyrate; li- 

 gules shortly exserted. — Hab. Naturalized in Jamaica !, Al., M'Nab, near Kingston, in the 

 Blue Mountains; [introduced from Europe]. 



57*. TARAXACUM, Sail. 



Involucre 2-serial. Receptacle naked. Achenium subcompressed-oblong, beaked above 

 the muricate or tubercled summit : pappus pilose, pluriserial, white. — Herbs ; leaves all 

 rosulate ; scape mostly \-headed ; head yellow. 



156*. T. officinale, Fill. Glabrous; leaves usually runcinate; involucral scales lan- 

 ceolate, exterior reflexed ; achenium muricate above, shorter than the beak. — Hab. Natura- 

 lized in Jamaica !, Wullschl. ; [introduced from Europe]. 



58. BRACHYRHAMPHUS, DC. 



Head 10-15-flowered. Involucre imbricate, few-'serial. Receptacle naked. Achenium. 

 snbterete, muricate, longitudinally furrowed, shortly tapering at the summit : pappus pilose, 

 pluriserial, white. — An annual, erect, branched, glabrous herb ; leaves usually runcinate- 

 lyraie, superior sagittate-clasping ; heads yellow, distant in a loose panicle, with spici- 

 form branches. 



157. B. intybaceus, DC. — Lactuca, Jacq. B. caribseus and sonchifolius, DC. — A 

 variable tropical weed: habit of Sonchus. — Hab. Antigua!, Wullschl.; Trinidad!, Cr. ; 

 [Portorico to Guadeloupe ! ; Nicaragua ; East Indies !, trop. Africa], 



59. LACTUCA, L. 



Involucre imbricate, Itw-serial. Receptacle naked. Achenium flat-compressed, smooth, 

 abruptly beaked : pappus pilose, white. — Heads narrow, usually paniculate. 



158. L. jamaicensis, Or. (n. sp.). Glabrous ; stem stout, erect ; leaves unarmed beneath, 

 dentate or entire, inferior usually runcinate with a few pointed lobes, or lanceolate-oblong, 

 half-clasping at the tapering base, superior lanceolate, acuminate, sessile ; panicle spreading : 

 branches racemiform ; achenium oval-oblong, black, 3-striate at the middle, much longer 

 than the very short beak. — Perhaps a form of L. indica,L. (Mauritius?), which has the 

 same acheuia, but much narrower leaves. Several feet high, suffrutescent at the base ; infe- 

 rior leaves 8"-4" long, 2"-l" broad, superior 4" long, 8"'-6'" broad ; panicle often 2' long ; 

 involucre 6"' long ; achenium 2'" long, rounded below the filiform beak, which is black with 

 a white summit, scarcely §'" long. — Hab. Jamaica !, M'Nab, March, Wullschl., in the 

 mountains of Port Royal, S. Marys, Manchester. 



60. SONCHUS, L. 



Involucre imbricate. Receptacle naked. Achenium flat- compressed, truncate at the 

 summit : pappus pilose, white. — Heads yellow. 



159. S. oleracens, L. Annual ; leaves runcinate or snbentire, dentate : corymbs eglan- 

 dular ; achenium 3-striate, transversely rugulose. — Hab. Jamaica !, M'Nab ; Antigua !, 

 Wullschl., S. Vincent !, Guild. ; Trinidad !, Cr., a weed ;. [Europe ! to Abyssinia '., East In- 

 dies \, Australia !, New Zealand ! ; Canada ! to Patagonia]. 



