NKW OH NOTI<:\VOH'J'HY OI^CIIIDS 
fimbriata. Labellum oblongo-panduralum, Irinervium, 
supra medium spathulatum, prope apicem glandulosum, 
basi cordata auriculis incurvis, margine ciliata. Discus callo 
Iransverso prope basim labelli ornalus. Columna superne 
dilatata, apice fimbriala. 
Hoots coarsely fibrous, whitish. Rhizome abbreviated. 
Secondary stems 5-10 cm. long, 1-2 mm. in diameter, erect, 
entirely concealed by tubular closely oppressed sheaths. 
Sheaths 1.3-2.5 cm. long, hispidulous along the nerves, di¬ 
lated above, forming a lamina which is 7-11 mm. long 
ovate-lanceolate in outline, with the margin hispidulous. 
Leaf 4-6 cm. long, 1.2-1.5 cm. wide, elliptic-lanceolate, at¬ 
tenuated toward the ends, bidentate at the apex, coriaceous, 
marginatc. Peduncles fasciculate in the axil of the leaf, 
enclosed at base by a spathaceous bract which is 1-1.5 cm. 
long. Raceme with the peduncle 1.5-3 cm. long, much 
shorter than the leaf, few-tlowered. Bracts of the inflores¬ 
cence about 1 mm. long, infundibuliform. Lateral sepals 
4.5 mm. long, about 1 mm. wide near the middle, ligulate, 
somewhat narrowed toward the obtuse or subacute apex, 
united almost to the middle, lightly carinate on the outer 
surface along the mid-nerve, margin ciliate. Dorsal sepal 
4.5-5 mm. long, narrowly lanceolate, acute, strongly con¬ 
cave, margin ciliate. Petals 2 mm. long, about .75 mm. 
wide, oblong, slightly dilated upward, unequally and 
deeply fringed on the margin, especially so above the middle. 
Labellum 3 mm. long, 1 mm. wide near the tip, 3-ncrved, 
margin ciliate, oblong-pandurate, the apical half more or 
less spatulate in outline, minutely glandulose, obtuse, the 
base cordate with the minute obtuse auricles incurved. Disc 
with a transverse callus which is prominently thickened at 
the middle near the base of the labellum. Clolumn 2 mm. 
long, dilated upward, deeply and unequally fringed. 
Pleurolhallis peraltensis is a close ally of P. Purpiisii 
Schltr., from which il differs in the broader leaves, larger 
flowers and in the structure of the labellum. P. gnomonifera 
Ames is also a close ally, but is quite different in having 
smaller flowers and a differently shaped labellum. 
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