Pleurothallis marioandresavilae

Description: — Plant epiphytic, up to 26 cm tall, erect; roots slender, flexuous, 0.5 – 0.7 mm in diameter. Ramicauls very slender, suberect, terete, 12.5 – 23.3 long and 0.1 cm in diameter, enclosed by papyraceous, tubular sheaths, upper sheath 2.8 mm long, basal sheath 1.25 mm long. Leaves erect, green suffused with purple at the margins and the underside, slightly convex, coriaceous, microscopically papillate, ovate, channeled in the middle, 5.5 – 7.4 × 1.5 – 1.8 cm, acuminate, slightly falcate at the apex, the base sessile, cordate. Inflorescence a fascicle of successive flowers produced from a suberect, spathaceous bract, ca. 0.9 mm long; floral bract infundibuliform, 3 mm long; pedicel tubular, 2.5 mm long. Flowers glossy, dorsal sepal yellowish-brown, slightly suffused with purple at the base, edges and veins, elliptical-obovate, 7.0 – 8.5 × 3.8 – 4.0 mm, 3 - veined, subverrucose, convex in the apical third; lateral sepals connate into a 4 - veined, elliptical-oblong, obtuse, minutely bifid pale purple with yellowish green base, 4.6 – 5.0 × 3.7 – 4.0 mm. Petals pale purple apex and base yellowish green, narrowly oblong, slightly constricted in the first apical third, acute, 3.8 – 4.0 × 0.6 – 0.8 mm, 1 - veined, papillose, margins entire. Lip red purple combined with orange in the base and margins, elliptical, obtuse, verrucose-striated, convex, 2.1 – 2.3 x 1.6 – 1.8 mm, 3 - veined, margin irregular; the base truncate, centrally channeled towards the apex of the lip, hinged to the column foot. Column yellowish green, transversely subrectangular, dorsally complanate, 1.3 – 1.5 × 1.0 – 1.2 mm, glabrous, stout, 3 - ribbed dorsally, stigma transversely bilobed with entire margins, rostellar flap 0.8 mm long. Anther cordiform, yellowish green, 0.3 mm long. Pollinarium with 2 obovoid, yellow pollinia, 0.2 mm long. Ovary subverrucose, curved in the middle, 2.0 – 2.3 × 1.0 mm.