MOUNT KOkAIMA L\ BEITISH GTJIANA. 39 



or quite glabrous. Corolla glabrous, the lube 1 liu. long-, slender below, dilated into a 

 campaoulate 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, McCotmell 8f Quelch, 640. 



This somewhat resembles EupatoHum Penllandianum, 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 PtTSCTJM, 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. Coiymbi compact! Capitula 15-16-flora. 



Involucri squanme biseriatae, interiores lineari-oblonga; acuta?, exteriores minores. 



Corolla subcylindrica, breviter 5-dentata, tubo glabro, dentibus dorso minute 



papillaris. Pappi setse scabridse, plus minusve fiexuosre, subfulvescentes. 



Flowering branches stout, 2-2J lin. thick, densely covered with a short blackish 



tomentum. Leaves opposite, rather crowded, 1-9 lin. distaut ; petiole 2-3 lin. long, 



stout, with a blackish tomentum, which spreads along the veins of the leaf; blade 



1-lf in. long, 10 lin. to If in. broad, broadly ovate, obtuse, rounded or subcordate, very 



shortly and irregularly dentate, with subobtuse teeth, or nearly entire, somewhat 



coriaceous, glabrous (except along the veins,) and densely gland-dotted above, Avith 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, 1J-2| in. diam., compact, with short branches, 



clothed with the blackish tomentum as are also the pedicels and involucres. Heads 



about ^ in. diam., 15-16-flowered. Involucral-scales in two series ; the inner about 



2 lin. long, h 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 papilloe on the back of the f 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., McCotmell Sf Quelch, 648. 



A very distinct species, which would appear to be best placed near JEJ. uummularia, 

 Hook. & Am. 



Baccharis Vitis-idjea, Oliver, in Trans. Linn. Soc. Ser. II. Bot. ii. (1887), p. 277, t. 43. f. A. 

 Upper slopes and summit of Mount Roraima, McC'omiell 8f Quelch, 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 petioluni 

 attenuata, integra, coriacea, nitida. Capitula sessilia, 2-1-na ad apices ramorum 

 confertavel solitaria, discoidea. Flores hermaphroditi steriles, corollae tubo anguste 



