Appendicula hexadens Ormerod, Checkl. Papuasian Orch. (2017) 24, 462 (fig.).
Type: Brass 23385 (holo AMES).
Epiphytes. Rhizome not seen. Roots terete, pubescent, to 0.1 cm thick. Stem terete, leafy throughout, 41 by 0.20-0.25 cm. Leaves lanceolate to ligulate-lanceolate, 4.5-8.6 by 0.8-1,3 cm; margins minutely serrate to dentate toward the apex; apex 3-dentate, tips to 0.15 cm long ; leaf sheaths tubular, striate, opposite the leaf lamina with a 0.1-0.35 cm deep gap. Inflorescence pseudoterminal, 5.5 cm long; peduncle 1.5 cm long ; rachis 4 cm long; floral bracts narrowly oblong, reflexed, concave, to 0.5 cm long. Flowers many, dense, opening in succession. Pedicel and ovary club-shaped, c. 0.45 cm long. Median sepal ovate, 0.43 by 0.26 cm; midnerve keeled near tip; apex obtuse; 3-nerved. Lateral sepals obliquely ovate, subacute, 0.44 (along top margin) or 0.57 (along lower margin) by c. 0.46 cm; 3-nerved; mentum broadly rounded, widely ellipsoid, c. 0.2 cm long. Petals oblong, 0.4 by 0.1.5 cm; apex obtuse to irregular; 3-nerved. Lip obovate-subpandurate, c. 0.52 cm long; hypochile elliptic, concave, c. 0.25 by 0.15 cm: epichile transversely broad elliptic, c. 0.25 by 0.39 cm; margin irregularly dentate; keels 2, on the hypochile fused and swollen , grooved, at the base obtuse, in front somewhat narrowing and separating, continuing on the epichile as low, swollen, laterally curved keels. Column short. stout. semiterete, c. 0.2 cm long; column foot c. 0.2 cm long. (After Ormerod, 2017).