below, subcoriaceous, about 16.5 cm. long and 3.2 cm. 
wide, with the mid-nerve suleate on the upper surface 
and carinate beneath; petiole rather slender, channelled, 
2.7cm. long. Inflorescences one or two, erect or spread- 
ing, much shorter than the leaf; peduncle slender, en- 
tirely or nearly concealed by six loose convolute scarious 
sheaths, about 7 cm. long; pedicellate ovary concealed 
and surpassed by a similar convolute sheath. Flower 
medium-sized for the genus, rigid-nervose. Dorsal sepal 
oblong, abruptly rounded but with a dorsal subapical 
mucro, lightly concave, about 2.1 em. long and 8 mm. 
wide. Lateral sepals lanceolate-oblong, lightly oblique, 
obtuse but with a dorsal subapical mucro, about 2.3 em. 
long measured along the posterior margin and 7.6 mm. 
wide at the base. Petals oblong-lanceolate or elliptic- 
lanceolate, narrowed above and below, acute, slightly 
oblique, about 1.9 cm. long and 5.4 mm. wide across 
the middle. Lip lightly recurved and tubular-involute 
in natural position, narrowly elliptic in outline when ex- 
panded, lightly 3-lobed above the middle, about 1.6 em. 
long and 7.6 mm. wide across the middle when expanded : 
lateral lobes without free apex, rounded above; mid-lobe 
ovate-oblong, very fleshy, rounded at the apex, about 
5.1 mm. long; disc with a fleshy band which is indistinct 
through the center of the lower half but gradually be- 
comes more defined in the middle and forms an ovate- 
oblong obtuse fleshy callus. Column stout, arcuate, about 
9.5 mm. long, with a minute erose-margined clinan- 
drium, produced into a stout foot about 7 mm. long. 
This species appears to have several more or less close 
allies. It differs from the Colombian Mawillaria brunnea 
Linden & Reichb.f. in its smaller leaves, dissimilar acute 
petals, as well as in the color of the flowers. It is dis- 
tinguished from the Colombian M. Shepheardu Rolfe by 
its narrower leaves, dissimilar petals and shorter lip with 
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