360 SYNANTHEREJE. 



1-2, short ; achenium glabrous •. pappus-hairs setaceous. — In habit it approaches Hebecli- 

 nium, but has a glabrous receptacle : it is to be compared with E. pallescens, DC, unknown 

 to me. Leaves 3", cuneate base 6'" long; panicle 6" diam. ; involucre 2'" long, straw- 

 coloured ; receptacle as thick as the slender pedicel ; style-branches clavate, long-exserted ; 

 achenium 5-gonal, half as long as the white pappus. — Hab. Trinidad !, Cr. 



38. E. canescens, Y. Shrubby ; branches cylindrical, tomentose ; leaves opposite, 

 petioled, small, ovate-roundish, rounded-Hunt, sinuate-crcnate or entire, S-nerved, tomen- 

 tose or puberulous above, hoary-tomcntose beneath, slightly glandular ; corymbs simple, urn- 

 belliform, terminal on racemose branchlets : heads \0-flou;ered, pedicellate ; receptacle mi- 

 nute, flat ; involncral scales spreading, 3-serial, very unequal, striate, puberulous on the back 

 or glabrescent, interior oblong, blnntish, exterior ovate, blunt ; achenium puberulous : pappus 

 straw-coloured.— Plum. Ed. Burm. 1. 128./. 1. Vahl, Symb. t. 73. Lam. III. t. 672./ 5. 

 — E. sinuatum, Lam. — A small shrub, with spreading branches ; leaves 5"'-10"', involucre 

 2"' long.— Hab. Antigua !, Wullschl. ; [Haiti to De'sirade !]. 



39. E. iresinoides, Kth. SufFruticose, slender, trailing ; branches cylindrical, pubes- 

 cent or glabrate ; leaves opposite, petioled, ovate, acuminate, or ovate-lanceolate, cuneate at 

 the base, remotely toothed or entire, triplinerved, villous-pubescent beneath, or glabrescent, 

 subeglandular ; corymbs in a loose panicle: heads ^-flowered, in small cymes, glomerate- 

 sessije or pedicellate ; receptacle minute, flat ; involucral scales spreading, 3-serial, very 

 unequal, striate, glabrous, pointed, interior oblong, exterior shortly elliptical; achenium 

 scabrous on the angles : pappus white. — Kth. N. Gen. t. 340. — E. Sieberianum, DC. I 

 Mikania serratifolia, Sieb. Tr. 72. — Leaves 3"-l", involucre 2"' long ; flowers white. — Hab. 

 Dominica !, Imr. ; S. Vincent !, Guild. ; Trinidad !, Sieb., Lockh., Cr. ; [Martinique ; Pa- 

 nama ! to Venezuela]. 



40. E. tetranthum, Gr. (n. sp.). Suffruticose, slender, trailing; branches cylindrical, 

 striate, slightly puberulous, or glabrate ; leaves opposite, petioled, oblong -lanceolate, acumi- 

 nate with a bluntish point, bluntish at the base, rigidulous, repand or subentire, triplinerved, 

 reticulated, glabrous, subeglandular ; corymbs trichotomous, in a large spreading panicle : 

 heads ^-flowered, pedicellate, in small, fastigiate, special corymbs ; receptacle very minute ; 

 involucral scales 10, loosely imbricate, 3-4-serial, striate, scabrous with minute glands, de- 

 void of hairs, blunt, interior oval-oblong, the other oval ; achenium scabrous on the angles : 

 pappus tawny. — Leaves 3"-li" long, 16"'-6"' broad: petiole 3"'-4 w long, not enlarged; 

 panicle often 6" long, pyramidal ■. internodes in the primary axis 1" long, in the branches 

 gradually shorter ; heads ovoid ; involucre tawny, 1'" long .- scales convex, 3-striate ; ache- 

 nium 5-gonal, black, as long as the pappus : pappus-hairs scabrous, flattened at the base. — 

 Hab. Jamaica !, Sw., mixed with Critonia parviflora, but devoid of pellucid dots, Macf., 

 Pd., Wullschl., in woods, Manchester. 



§ 4. Eximbbicata, DC. — Receptacle depressed, usually minute. Involucre spreading, 

 l(-3)-serial, often with shorter, exterior scales: scales of the principal series sub- 

 equal. 



* Stem shrubby ; leaves glabrescent. 



41. E. glandulosum, Kth. Shrubby; branches cylindrical, densely glandular, with 

 short, stipitate glands, devoid of hairs ; leaves opposite, petioled, rhomboid-ovate, sharply 

 pointed, coarsely serrate above the cuneate base and below the point, 3-nerved, nearly gla- 

 brous above, hispidulous along the nerves and glabrate beneath, obscurely glandular and with 

 stipitate glands on the petiole and the lower part of the margin ; corymbs fastigiate-tricho- 

 tomous -. heads iO-IO-Jlowered, clustered, pedicellate ; receptacle flat ; involucral scales 

 lanceolate, acuminate, striate, glandular-ciliate, most subequal: corolla abruptly dilated ; 

 achenium glabrous. — Kth. N. Gen. t. 346. — E. adenophorum, Spreng. — Leaves 2", petioles 

 10"'-8'", involucre 2'" long ; style-branches slender, puberulous. — Hab. Jamaica !, March ; 

 [Mexico]. 



42. E. ageratifolium, DC. Shrubby; branches cylindrical, glabrous, puberulous at 

 the summit, eglandular; leaves opposite, petioled, ovate or deltoid, with a bluntish point, 

 coarsely serrate abeve the subtruncate or rounded base and below the point, triplinerved near 

 the base, glabrous, eglandular ; corymbs trichotomous : heads 10(-20)-ftoicered, pedicellate ; 

 receptacle minute ; involucral scales lanceolate, bluntish, subestriate, glabrescent, most sub- 



