Leptochilus decurrens Blume

Rhizome dorsiventrally flattened, 2.5-3 mm wide, short-to medium-creeping, internodes 1-15 mm long, not white waxy, roots densely set; vascular strands c. 6, without sclerified sheaths, sclerenchyma strands 20-100, scattered. Rhizome scales pseudopeltate, sometimes peltate, densely set, slightly spreading, narrowly ovate or triangular, 2-5 by 0.3-1 mm, clathrate or subclathrate, cells longitudinally rectangular towards the apex, margin entire to finely denticulate, central region glabrous or bearing multiseptate hairs. Fronds strongly dimorphic, stipitate, thin-herbaceous to herbaceous. Fertile fronds: stipe 14-50 cm long; lamina simple, linear, 0.1-1 cm wide. Sterile fronds: stipe absent or to 18 cm long, 1.2-1.7 mm thick; lamina simple, ovate to narrowly ovate-obovate, 10-50 by 2.5-11 cm, index 2-5, lower surface without acicular hairs, base narrowly angustate, broadly long-decurrent, gradually narrowing to two ridges at base of stipe. Venation: veins prominent and distinct, 5-12 mm apart, more or less straight or zigzag, dichotomously branched below the middle to near the margin, or each costal areole giving rise to two lateral veins, thus the lateral veins seemingly branching at or near the costa; connecting veins 3-8, anadromous, forming more or less equally sized areoles, included veins more or less immersed and indistinct, free veinlets simple or once forked. Sori acrostichoid, covering the lamina.

A terrestrial species sometimes growing on basaltic rock, but usually in deep, phosphate-rich soil. It is mostly confined to shaded positions in tall rainforest on the plateau, often growing with Bolbitis heteroclita and Corymborkis veratrifolia.