the petals spreading or reflexed. Lateral sepals oblong- 
lanceolate, oblong-spatulate or rarely oblong-elliptic 
(sometimes obliquely so), 8.2-16 mm. long, 2.5—-4.5 mm. 
wide, often concave especially toward the tip which is 
commonly somewhat thickened and subearinate, subacute 
to acuminate-acute at the apex, smooth or asperate on 
the outer surface. Dorsal sepal somewhat narrower than 
the laterals, oblong-oblanceolate, cuneate-spatulate or 
narrowly elliptic, 8.2-16 mm. long, 2—3.5 mm. wide, 
subacute to acuminate-acute at the apex. Petals filiform, 
narrowly oblanceolate or oblong-spatulate, 8-14.5 mm. 
long, .8-2 mm. wide, obtuse to acute at the apex, the 
margins toward the apex sometimes minutely denticulate. 
Labellum with a long claw which is adnate to the col- 
umn; lamina ranging from nearly simple to 8- or 4-lobed, 
in general outline transversely subrectangular to subro- 
tund or subquadrate, 4-9 mm. long, 5.8-12 mm. wide 
across the lateral lobes; lateral lobes very variable, being 
shallowly dolabriform, dolabriform, obliquely rhombic- 
dolabriform, obliquely triangular-ovate, obliquely ovate, 
obliquely oval or subrectangular, the posterior margin or 
angle is usually rounded forming a more or less cordate 
base, the anterior margin or angle is porrect or at right 
angles to the median axis, and in some instances bears a 
small upright lobule at its outer edge, the lateral margin 
of the lateral lobes varies from subentire to somewhat bi- 
lobular or undulate to somewhat lacerate (J@.isthmitorm ); 
mid-lobe variable ranging from broadly truncate-cuneate 
to long-bilobulate, truncate, retuse (due to the porrect 
lobules) or protuberant and often apiculate at the apex. 
The lobules of the mid-lobe are exceedingly variable in 
shape and degree of divergence, ranging in shape from 
acinacitorm through linear or faleately linear-oblong to 
narrowly triangular or else to oblong, spatulate-oblong or 
narrowly rectangular. The degree of divergence is from 
[70 ] 
