REES E EE e ET UT 
MOUNT RORAIMA IN BRITISH GUIANA, 59 
3-flowered. Bracts spathaceous, minute. Pedicels 1 à lin. long. Dorsal sepal ovate at 
the base, caudate-acuminate above, 2 lin. long; lateral similar, but narrower at the base. 
Petals oblong, obtuse, 1 lin. long, thinly membranaceous. Lip trilobed, 1 lin. long ; 
side lobes spreading, broadly rounded; front lobe oblong, obtuse; dise bearing a pair of 
thickened nerves. Column clavate, 3 lin. long. 
Roraima, summit, 8600 ft., MeConnell & Quelch, 687.—Endemice. 
Allied to the Colombian Pleurothallis intricata. Lindl, but smaller in all its parts, 
besides being different in structure. The species of the natural group Lepanthiformes, 
to which it belongs, were distributed by Lindley into three sections, owing to the 
exigencies of an admittedly artificial arrangement, which would place the present one 
in the section Acuminate. 
STELIS GUIANENSIS, Rolfe, sp. n. Ciespitosa. Caules brevissimi. Folia oblanceolato- 
oblonga, subobtusa, basi subattenuata. Scapi graciles, multiflori. ` Braetem 
triangulari-ovat:e, acute. Pedicelli breves. Sepala orbiculari-ovata, obtusa, basi 
connata. Petala suborbicularia, concava. Labellum integrum, suborbiculare, 
petalis paullo angustius. 
A dwarf, densely-tufted plant, with very short stems. 
subobtuse, somewhat attenuate at the base, 4-9 lin. long, 14-2 lin. broad. 
slender, 24 in. long, many-flowered. Bracts triangular-ovate, acute, 3 lin. long. Pedicels 
à lin. long. Sepals orbicular-ovate, obtuse, $ lin. long, slightly pubescent, the basal 
fourth connate. Petals broadly orbicular, somewhat concave, not half as long as the 
sepals. Lip entire, rather narrower than the petals, but otherwise very similar. 
Roraima range, 3500 ft., McConnell & Quelch, 103.—Endemic. 
A species belonging to Lindley’s small group MJonastachye apode, and allied to the 
Peruvian S. pusilla, H. B. & K. A specimen collected at the Kaieteur Savannah, 
Potaro River, British Guiana, by Jenman (1055), is either a form of the same or a 
Leaves oblanceolate-oblong, 
Scapes 
closely allied species. 
BRACHIONIDIUM BREVICAUDATUM, Rolfe, sp. n. Caulis primarius repens, brevis: 
secundarius brevissimus. Folia breviter petiolata, elliptico-lanceolata, tridenticu- 
lata. Pedunculi filiformes, uniflori. Bracteze apice acuminatze. Sepalum posticum 
ovatum, apice abrupte acuminatum vel brevissime caudatum ; sepala lateralia 
omnino connata et postico subsimilia. Petala ovata, acuminata vel brevissime 
caudata, margine plus minusve ciliata. Labellum sessile, trilobum, lobis lateralibus 
faleato-oblongis subobtusis, intermedio reflexo late ovato-rotundato. Columna lata. 
Primary stem creeping, with short internodes, clothed with membranaceous sheaths ; 
secondary very short, clothed with about two tubular membranaceous sheaths having a 
short acuminate apex. Leaves shortly petioled, elliptical-lanceolate, shortly ope eae 
8-10 lin. long, 21-31 lin. broad ; petioles 14-2 lin. long. Pedunoles slender, i-ll in. 
long, bearing a short tubular acuminate sheath above the middle. Bract similar to the 
sheath but rather larger. Dorsal sepal ovate, abruptly giereg ot shortly phe 
4 lin. long by nearly 3 lin. broad, trinerved ; lateral pair united iuto a body closely 
i d 4-nerved. Petals ovate, shortly 
resembling the dorsal sepal, but rather broader and 4-n i. 
