MOUNT RORAIMA IN BRITISH GUIANA. 39 
or quite glabrous. Corolla glabrous, the tube 1 lin. long, slender below, dilated into a 
campanulate cup above the middle, with 5 ovate acute teeth } lin. long. Achenes 1 lin. 
long, 5-angled, slightly scabrous along the angles, blackish. Pappus-bristles slightly 
scabrous, rosy-purple. « 
Summit of Mount Roraima, McConnell & Quelch, 640. 
This somewhat resembles Eupatorium Pentlandianum, DC. (Mandon, 259), but the 
corolla, pappus, and achenes are all much shorter, the corolla is very different in form, 
the involucre-scales are longer and narrower, and the leaves are less sharply toothed. 
EuPATORIUM FUsCUM, N. E. Brown, sp. n. Rami validi, cum petiolis et corymbis 
nigrescente-tomentosi. Folia breviter petiolata, late ovata, obtusa, basi rotundata 
vel subcordata, irregulariter et obtuse dentata, subcoriacea, supra glabra, glanduloso- 
punctata, subtus fusco-pubescentia.  Corymbi compacti. Capitula 15-16-flora. 
Involueri squam:e biseriatz, interiores lineari-oblong:e acute, exteriores minores. 
Corolla subeylindrica, breviter 5-dentata, tubo glabro, dentibus dorso minute 
papillatis. Pappi setze scabride, plus minusve flexuosze, subfulvescentes. 
Flowering branches stout, 2-23 lin. thick, densely covered with a short blackish 
tomentum. Leaves opposite, rather crowded, 4-9 lin. distant; petiole 2—3 lin. long, 
stout, with a blackish tomentum, which spreads along the veins of the leaf; blade 
1-14 in. long, 10 lin. to 12 in. broad, broadly ovate, obtuse, rounded or subcordate, very 
shortly and irregularly dentate, with subobtuse teeth, or nearly entire, somewhat 
eoriaceous, glabrous (except along the veins,) and densely gland-dotted above, with a 
brownish or fuscous pubescence beneath; primary lateral veins 4-5 on each side of the 
midrib, 2-3 of them arising close to the base, the others at or above the middle, 
prominent beneath. Corymbs terminal, 11-23 in. diam., compact, with short branches, 
clothed with the blackish tomentum as are also the pedicels and involucres. Heads 
about 4 in. diam., 15-16-flowered. Involucral-scales in two series ; the inner about 
2 lin. long, 4 lin. broad, linear-oblong acute; the outer a little shorter, narrower and 
tapering from the base to an acute point. Corolla 2 lin. long, tubular, subcylindric, 
5-toothed, glabrous, with some minute papillz on the back of the $ lin. long, acute 
teeth. Ovary pubescent in the upper part with short fuscous subglandular hairs. 
Pappus-bristles numerous, scabrid, more or less flexuose, dull tawny. Ripe achenes not 
seen. 
Summit of Mount Roraima, 8600 ft., McConnell & Quelch, 648. 
A very distinct species, which would appear to be best placed near E. nummularia, ` 
Hook. & Arn. ou 
BACCHARIS VITIS-ID.£A, Oliver, in Trans. Linn. Soc. Ser. II. Bot. ii. (1887), p. 277, t. 43. f. A. 
Upper slopes and summit of Mount Roraima, McConnell & Queleh, 27, 91, 650.— 
Endemic. 
HETEROTHALAMUS DENSUS, N. E. Brown, sp. n. (Plate 7, figs. 1-7.) Planta nana, perennis, 
dioica, dense foliosa. Folia patentia, lanceolata, acuta vel obtusa, basi in petiolum 
attenuata, integra, coriacea, nitida. Capitula sessilia, 2-4-na ad apices ramorum 
conferta vel solitaria, discoidea. Flores hermaphroditi steriles, corollze tubo anguste 
