864 SYNANTHEREiE. 



pappus pale-rusty. — Hab. Jamaica !, Mac/., Pd., Westmoreland ; S. Lucia (Sm.) ; [Gua- 

 deloupe 1]. 



+t Heads pedicellate, or the central only sessile : bractlet at the base of the involucre, 



or wanting. 



60. M. rotunda, Gr. (n. sp). Stem scandeut, glabrous, striate-cylindrical ; leaves 

 rigid, oval-roundish, shortly apiculate, quite entire, triplinerved, with the nerves prominent 

 beneath, and a delicate, suprabasilar pair, glabrous, eglandular ; corymbs trichotomous, iu 

 axillary, loose panicles : peduncles puberulous : pedicels ternate, little shorter than the head : 

 bractlet lanceolate-linear, one-third as long as the involucre, or wanting ; involucral scales 

 oblong-linear, blunt, substriate, glabrous ; corolla subclavate : limb cylindrical, as long as 

 the tube, 5-toothed with deltoid teeth ; achenium glabrous. — A stout climber ; leaves 4"-3" 

 long, 3"-2£" broad: petiole 8"'-10"' long; panicles 6" long, expanded; corymbs 2"-H" 

 broad: lateral pedicels 2"', central 1"'-1£' long; involucre 3'" long; pappus tawny- 

 whitish. — Hab. Trinidad !, Cr., at Tocuche. 



61. M. gonoclada, DC. Stem twiuing, angular, pubescent; leaves deltoid, broadly 

 cordate, or subcordate at the base, 5 -nerved, irregularly deutate or subentire, pubescent 

 beneath (or glabrescent), inferior as long as the petiole, superior often ovate; corymbs pa- 

 niculate, special ones contracted : peduncles villous-pubescent : pedicels ternate, much shorter 

 than the head -. bractlet lanceolate or elliptical-lanceolate, acuminate, half as long as the 

 involucre ; involucral scales oblong, substriate, bluntish or pointed, pubescent ; corolla-limb 

 h-fld, campanulate, as long as the tube ; achenium glabrous. — M. surinamensis, Miq. ! ; a 

 form with glabrescent, pointed involucral scales. M. Guaco, Desc. (Ft. 3. t. 197) : the 

 figure combines the inflorescence of this species with the uuinerved leaves of M. Guaco, 

 Bonpl. — Leaves 4 // -2" diam. ; involucre 3'" long; pappus pale-rusty. — Hab. Jamaica!, 

 Macfl, Pd., Al., Wils., March ; [Cuba ! and Mexico 1 to Guiana ! and Brazil]. 



62. M. orinocensis, Kth. Stem twining, glabrescent, striate-cylindrical, slightly 

 angular above ; leaves membranaceous, cordate with a deep sinus, pointleted or acuminate, 

 5-nerved, dentate or subsinuate-repand, glabrescent ; special corymbs usually umbellate : 

 peduncles angular, slightly winged at the base, glabrescent: pedicels 3(-b)-nale, usually 

 shorter, often much shorter than the head : bractlet lanceolate, about half as long as the 

 involucre; involucral scales oblong or elliptical-oblong, blunt or mucronate, glabrescent, 

 striate; corolla-limb campanulate, nearly as long as the tube, 5-toothed with deltoid teeth; 

 achenium glandular. — M. umbellifera, Gardn. ! M. Sieberiana, DC. M. suaveolens, Kth. 

 (compared by Dr. Alexander in the British Museum) : a pubescent form. M. atriplicifolia, 

 Schultz Bip. I : a form with longer, excrescent bractlets. M. deltoidea, Pospp. ! : small- 

 leaved specimens. — Leaves 3"-2" long ; sinus often oblong, or deltoid, and obsolete in the 

 upper leaves ; involucre 2'" long ; pappus pale-rusty. The determination of this species rests 

 chiefly upon Seemann's Panama specimens, compared by Steetz with Humboldt's plant ; of 

 allied species M. alata, DC. {Kleinia, Mey. !, M. scandens, PI. Spruce !) has a 5 -fid corolla- 

 limb, and larger, acute involucral scales, M. scandens, W. (of the United States) a clavate, 

 5-toothed corolla, and narrow, acute scales. — Hab. Jamaica !, Pd., AL, March ; S. Vincent !, 

 Guild.; Trinidad!, Lockh., Sch., Pd., Cr., common iu moist places, along roadsides; 

 [Cuba !, Mexico ! to Ecuador !, Guiana ! to Brazil]. 



Series 3. Aster oideee. — Style-branches in the perfect or (? flowers flat, tapering beyond 

 the stigmatic lines into a lanceolate or deltoid appendage, which is hairy on the out- 

 tide {or reduced). — Leaves alternate ; pappus pilose in the West Indian genera. 



16. ERIGERON, L. 



Head radiate : the ray-flowers $? , numerous, the disk wholly or partly hermaphrodite. 

 Involucre few-1-serial. Receptacle naked. Anthers tailless. Achenium compressed: 

 pappus pilose. — Herbs ; ray purplish or white. 



Sect. 1. C<enotus, Nutt. — Ray-flowers shortly or not erserted. Achenium 2-nerved: 

 pappus \-serial. — Root annual. 



* Heads corymbose or solitary. 

 63. E. jamaicensis, Sw. Puberulous, glabrescent; stems ascending, few-1 -headed, 



