MOUNT RORAIMA l.\ BRITISH GUIANA. 57 



BIGNONIACE^l. 



Tabebuia Roraim-K, Oliver, in Trans. Linn. Soc. Ser. II. Bot. ii. (1887), p. 280, t. 15. 

 Upper slopes of Mount Knraima, McConnell 8f Quelch, '.VS. — Endemic. 



ACANTHACEiE. 



Ruellia Vinbex, Mart, ex Nees in Mart. El. Bras. ix. p. 12. 

 Ireng Valley, McConnell 8f Quelch, 253. 



Thyrsacanthus Scuo.miu kgkianus, Nees, in Hook. Lond. Journ. Bot. iv. (1845), p. 636. 

 Upper Essequelio River, Mr Cot/net I Sf Quelrh, 277. 



Dianthera guianensis, N. E. Brown, sp. n. Caulis bifariam pubescens. Eolia 



subsessilia, lanceolata vel ovato-lanceolata, acuta, basi angustata rotundata, 



utrinque glabra vel sparsim pubescentia. Tbyrsus terminalis, subspiciformis. 



pedunculatus. Bractese et bracteote lineari-lanceolatas, acutissirnse, subglabrae, 



ciliatae. Sepala 5, libera, lineari-lanceolata, acutissima, pnbescentia, eiliata. 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, bii'ariously pubescent brandies. Leaves spreading, subsessile, 



2-1 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, f-3| in. long, naked or bibracteate. Thyrsus spike-like, moderately dense. 



1-2^ in. long, 1-1A in. diam. Bracts and bracteoles 'l\-2>\ lin. long, linear-lanceolate, 



very acute, glabrous or slightly pubescent and slightly eiliate. Sepals 5, free, 3-3^ 



lin. long. | lin. broad, linear-lanceolate, very acuminate, pubescent, eiliate. Corolla 



two-lipped, pubescent in the upper part outside, apparently purple or red, spotted with 



darker; tube \ in. long; upper lip 4| in. long, oblong, with reflexed margins and 



minutely 2-lobed at the apex; lower lip oh 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 fy Quelch, 188 ; Kukenaam Valley, vm Thurn, 81 ; Mount 

 Roraima, Appun, 1387. 



VERBENACEvE. 

 Lippia SciioMBURGKiAXA, Schauer, in DC. Prod. xi. p. 577 ; Oliver, in Trans. Linn. Soc. 

 Ser. II. Bot. ii. (1887), p. 2S0. 

 Upper slopes of Mount Roraima, McConnell Sf Qnelrh, 2; Roraima Range, 3500 it., 

 McConnell 8f Quelch, 720; Ireng Valley, McConnell 8f Quelch, 235. 



I doubt if this Guiana plant is really distinct from the Brazilian L. glandulosa, 

 Schauer, described at the same place. 



SECOND SERTES. — BOTANY, VOL. VI. I 



