260 
cordate, obtuse or apiculate, denticulate, tricarinate, 2 lin. broad. 
Column short 
Yungas 1890 (459). 
A species belonging to the section Macrophyllae fasciculatae, 
and allied to P. ruberrima Lindl., a native of New Granada and 
Venezuela, but readily distinguished by the more dicia cor- 
date lip and the shorter and broader dorsal sepal. 
PLEUROTHALLIS DENSIFOLIA Rolfe n. sp. ! 
Leaves oblanceolate-linear or pain, obtuse, base atten- 
uate into the short petiole, 114—177 in. long, 172-2 lin. broad. 
Scapes slender, 314-4 in. long, 6-8-flowered ; pedicels slender, 4-6 
lin. long. Bracts triangular, acute, with funnel- -shaped base, 14 
lin. long. Dorsal sepal ovate-lanceolate, acuminate, concave at 
the base, 3 lin. long; lateral ones connate, similar in shape, but 
rather longer. Petals obovate-oblong, obtuse, membranaceous, I 
lin. long. Lip entire, oblong, obtuse, tricarinate, 114 lin. long. 
Column broadly winged, rather shorter than the petals. 
Yungas, 1890 (216). 
A species belonging to the section Apodae caespitosae, and 
allied to P. picta Lindl., a native of British Guiana, but different 
in its rather narrower leaves, longer tails to the sepals, and larger 
petals, which are not spatulate. 
PLEUROTHALLIS SCABRIDULA Rolfe n. sp. 
Stems erect, slender, scabrid, leafy, 114-2 in. long, the sheaths 
with free ovate scabrid-ciliate spreading limb. Leaves elliptical- 
oblong, obtuse, 24-4 lin. long, 1-2 lin. broad.  Racemes slender, 
I-11 in. long, 5-8-flowered. Bracts minute. Pedicels slender, 3 
lin. long. Dorsal sepal oblong-lanceolate, caudate, acuminate, 214 
lin. long; lateral sepals linear-caudate, 3 lin. long. Petals lanceo- 
late- linear, acute, 12 lin. long. Lip linear-oblong, % lin. long. 
Column nearly equalling petals. 
Songo (907). 
A species belonging to the section Caulescentes, and allied to 
P. diptera Lindl., but less than half the size and more than twice 
as slender. 
STELIS BANGI1 Rolfe n. sp. 
Stems 17-214 in. long, clothed with two or three long tubular 
sheaths. ` Leaves linear-oblong, subobtuse, base attenuate, 214—4 
in. long, 5-9 lin. broad. Spikes solitary, 5-9 in. long.  Bracts dis- 
tichous. conduplicate, ovate ‚acuminate, 3-5 lin. long. Pedicels 1%. 
-2 lin. long. Perianth 3 lin. in diameter, lobes short, very broadly 
