MOUNT RORAIMA IN BRITISH GUIANA. 57 
BIGNONIACE;JE. 
TABEBUIA RoRArIME, Oliver, in Trans. Linn. Soc. Ser. II. Bot. ii. (1887), p. 280, t. 45. 
Upper slopes of Mount Roraima, McConnell & Quelch, 33.—Endemic. 
ACANTHACE.E. 
RUELLIA VINDEX, Mart. ex Nees in Mart. Fl. Bras. ix. p. 42. 
. Ireng Valley, McConnell & Quelch, 258. 
THYRSACANTHUS SCHOMBURGKIANUS, Nees, in Hook. Lond. Journ. Bot. iv. (1845), p. 636. 
Upper Essequebo River, McConnell & Quelch, 277. 
DIANTHERA GUIANENSIS, N. E. Brown, sp. n. Caulis bifariam pubescens. Folia 
subsessilia, lanceolata vel ovato-lanceolata, aeuta, basi angustata rotundata, 
utrinque glabra vel sparsim pubescentia. Thyrsus terminalis, subspiciformis, 
pedunculatus. Bracteæ et bracteole lineari-lanceolatze, acutissime, subglabrie, 
ciliatee. Sepala 5, libera, lineari-lanceolata, acutissima, pubescentia, ciliata, Corolla 
superne pubescens, labio superiore oblongo marginibus reflexo apice minute bilobo, 
labio inferiore 3-lobo disco plicato-elevato.—Justicia sp., Oliver, in Trans. Linn. 
Soc. Ser. II. Bot. ii. (1887), p. 280. 
Shrubby, with terete, bifariously pubescent branehes. Leaves spreading, subsessile, 
2—4 in. long, 7-18 lin. broad, lanceolate or ovate-lanceolate, acute, narrowed below the 
middle to a rounded base, glabrous or sparsely pubescent on both sides. Peduncles 
terminal, 3-31 in. long, naked or bibracteate. "Thyrsus spike-like, moderately dense, 
1-21 in. long, 1-14 in. diam. Bracts and bracteoles 23-3} lin. long, linear-lanceolate, 
very acute, glabrous or slightly pubescent and slightly ciliate. Sepals 5, free, 3-84 
lin. long, 2 lin. broad, linear-lanceolate, very acuminate, pubescent, ciliate. Corolla 
two-lipped, pubescent in the upper part outside, apparently purple or red, spotted with 
darker; tube 1 in. long; upper lip 43 in. long, oblong, with reflexed margins and 
minutely 2-lobed at the apex; lower lip 52 lin. long, 3-lobed, with an elevated plicate 
disk. Stamens 2, inserted at the middle of the tube; anthers 2-celled, with unequal 
cells, obtuse at each end, separated by a broad connective. 
Kotinga Valley, McConnell § Quelch, 188; Kukenaam Valley, im Thurn, 81; Mount 
Roraima, Appun, 1387. 
VERBENACEA. 
LIPPIA SCHOMBURGKIANA, Schauer, in DC. Prod. xi. p. 577; Oliver, in Trans JLinn. Soc. 
Ser. II. Bot. ii. (1887), p. 280. | 
Upper slopes of Mount Roraima, McConnell A Quelch, 2; Roraima Range, 3500 ft., 
McConnell & Quelch, 720; Ireng Valley, McConnell & Quelch, 235. 
I doubt if this Guiana plant is really distinct from the Brazilian Z. glandulosz, 
Schauer, described at the same place. 
SECOND SERTES.—BOTANY, VOL. VI. 
I 
