Gastrochilus prionophyllus

Description. Epiphytic herbs, stem pendulous, 10 - 15 cm long, ca. 1.25 mm in diameter, slender, unbranched with tiny red-purple spots. Leaves alternate, distichous, ovate, 0.9 - 1.3 x 0.3 - 0.5 cm, margin significantly serrate; leaf apex acuminate with 2 unequally awns; abaxial leaves with purple spots and sometimes on the adaxial leaves. Inflorescences several, opposite to leaves, subumbellate, 2 - 3 - flowered; peduncle 0.9 - 1.1 cm, slender, upper part enlarged, lower part with 2 cupular sheaths; floral bracts ovate-lanceolate, 1.0 - 1.2 mm; pedicel and ovary 0.9 - 1.1 cm. Flower yellow-green, with reddish brown spots. Dorsal sepal concave, oblong-elliptic, 3.4 - 3.7 x 2.3 - 2.6 mm, apex obtuse; lateral sepal concave, oblong-elliptic, 3.6 - 4.2 x 2.6 - 3.0 mm, apex obtuse; petals subobovate, 3.5 - 4.1 x 2.3 - 2.5 mm, apex obtuse. Lip with an epichile and a saccate hypochile; epichile nearly reniform, 2.8 - 3.3 x 4.9 - 5.3 mm, adaxially glabrous, with a thicken central cushion and 2 conic calli near base, margin irregularly denticulate; hypochile subconic, laterally compresses, 5.0 - 5.7 mm tall, 4.5 - 5.0 mm in diameter, apex rounded. Column stout, ca. 2.5 mm long; anther cap narrowed into a beak toward apex; rostellum bilobed with acuminated tip, and arising a horn-like awn from the center of each lobe (obvious in the lateral view).