384 , SYNANTHERE^. 



involucre 5"'-6"' long. — Hab. Jamaica I, Wacf. ; Trinidad I, Lockh., Cr., in barren Mk ; 

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



Teibe hi. LIGULIFLOB^. — Corolla homogamous, all ligulate. 



56*. LAMPSANA, T. 



Head 8-12-flowered. Involucre l-serial, with accessory scales. Becepiacle naked. 

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



/ 155*. Ii. communis, L. Annual, glabrescent; leaves dentate or inferior lyrate; H- 

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

 Blue Mountains; [introduced from Europe]. 



57*. TARAXACUM, Hall. 



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, Vill. Glabrous ; leaves usually runcinate ; involucral scales lan- 

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

 > 1 lized in Jamaica I, Wullschl. ; [introduced from Europe]. 



58. BRACHYEHAMPHUS, DC. 



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

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

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

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

 form tranches. 



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

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

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



59. lACTUCA, L. 



Involucre imbricate, few-serial. Becepiacle naked. Achenium flat-compressed, smooth, 

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



158. Ii. jamaicensis, Gr. (n. sjp). Glabrous ; stem stout, erect ; leaves unarmed braeath, 

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

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

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

 than the very short feaA.-^Perhaps a form of L. indica, L. (Mauritius ?), which has the 

 same achenia, but much natroTver leaves. Several feet 'high, sufirutescent at the base ; infe- 

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

 involucre 6'" long ; achenium 3'" long, rounded below the filiform beat, which is black with 

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

 mountains of Port Royal, S. Marys, Manchester, 



60. SONCHUS, L. 



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

 summit ; pappus pilose, white. — Heads yellow. 



/'isg. S. oleraceus, Z. Annual ; leaves runcinate or snbcntire, dentate : corymbs eglan- 

 dular; achenium 8-striate, transversely rugulese. — Hab. Jamaica I, M'Nab; Antigua!, 

 WuUschl., S. Vincent !, Quild. ; Trinidad !, dr., a weed ; [Europe ! to Abyssinia !, East In- 

 diesH, Australia I, New Zealand ! ; Canada ! to Patagonia]. 



