MOUNT RORAIMA IN BRITISH GUIANA. 75 
trifide, 1-nerves, submembranace:e, glabræ ; glum:e florentes oblongw, longe 
aristatee, basi longe pilose, 5-nerves. Palea lineari-oblonga, bifida vel emarginata, 
2-nervis, membranacea, marginibus inflexis. 
Perennial, 13-3 ft. (or more ?) high. Stems laxly leafy to the top, glabrous. Lower 
leaves 9-20 in. long, the upper gradually shorter, 12-3 lin. broad, erect, slightly rigid, 
linear, complicate, very obliquely subacute, glabrous or occasionally very minutely and 
thinly scaberulous on the back, microscopically papillate on the upperside, sometimes 
pilose and ciliate with long hairs just above the ligule, which is reduced to a dense ring 
of hairs. Panicle slightly nodding, 4-6 in. long, 1$-24 in. broad, not very dense, its 
branches and pedicels scaberulous or villose. Spikelets 8-9 lin. long, 3-5-flowered, the 
rhachilla readily disarticulating between the flowers, which are hermaphrodite. Empty 
glumes 2, subequal, 3-34 lin. long, linear, acute and mucronate or shortly bifid at the 
apex, l-nerved, membranous, glabrous. Flowering glume (excluding the awn) 8 lin. long, 
oblong-lanceolate, very concave, villose on the basal part with white hairs 2 lin. long, 
5-nerved, trifid at the apex, with the middle tooth (or nerve) running out into a straight 
scabrid awn about 4 lin. long. Pale 2} lin. long, oblong-linear, with inflexed margins, 
bifid or emarginate at the apex, 2-nerved, scabrous on the nerves, otherwise glabrous. 
Lodicules j lin. long, broad and oblique, subentire or crenately 2-lobulate, glabrous. 
4 
Stamens 3. Ovary about 1 lin. long, slightly fusiform, or subterete, glabrous. Styles 2, 
plumose for $ of their length, yellow or brown. 
Summit of Mount Roraima, 8600 ft., McConnell & Quelch, 673. 
Allied to A. pilosa, D'Urv. 
8624 ARUNDINARIA DEFLEXA, N. E. Brown, sp. n. Culmi superne ramosi, ramis erectis 
teretibus glabris foliosis. Folia deflexa, lanceolata, acuminata, glabra, marginibus 
scaberulis; ligula brevis, subtruncata; vagina ad apicem longe setosa. Panicula 
terminalis, erecta, angusta, laxa, glabra. Spicule anguste, pauciflore. | Glum:e 
inferiores 3 vacuze, gluma extima minimus, 2 sequentes florentibus subsimiles sed 
minores; glume florentes ovato-lanceolatze, obtusm, concave, 7-nerves, glabrie, 
Palea angusta, brevissime bifida, bicarinata, carinis ciliatis. 
minutissime ciliat:e. 
Branches very erect, close to aud parallel with 
Stems branching in the upper part. 
the main stem, terete, glabrous, leafy, nearly concealed by the leaf-sheaths. Leaves 
deflexed, 5-51 in. long, 9-11 lin. broad, lanceolate, tapering to a very acute point, 
glabrous on both sides, scabrid on the margins, probably slightly glaucous beneath ; 
primary veins not very distinct from the rest; sheaths closely embracing the stem, 
glabrous, striate, with a fringe of long bristles at the apex; ligule short, subtruncate, 
glabrous. Panicle 5-11 in. long, 1-2 in. broad, lax, with slender ereet glabrous branches. 
Spikelets about 3-flowered, 5-6 lin. long, narrow, with the 3 lower glumes empty, the 
lowest of which is about 1 lin. long, the second and third 2-21 lin. long, oblong, obtuse, 
concave, glabrous, not ciliate, obscurely 5-7-nerved. Flowering glume 33-3} lin. long, 
ovate-lanceolate, obtuse, concave, glabrous, very minutely ciliate, T-nerved. Pale 3 lin. 
long, linear-oblong, with inflexed sides, slightly bifid at the obtuse apex, with 2 keel-like 
ciliate nerves. Anthers 14 lin. long, linear. 
Summit of Mount Roraima, 8600 ft., McConnell § Quelch, 678. S 
