Lomagramma angustipinna Copel.

Rhizome 1 mm wide, containing 4 meristeles besides the root-bearing ventral one; rhizome-scales 1-2 mm long, cell-walls very dark. Sterile acrophylls: stipe 14 cm; lamina 50 cm long with c. 30 pairs of pinnae, lower ones decreasing; middle pinnae 10.5 by 0.8 cm, falcate-acuminate, subsessile, base very narrowly cuneate on basiscopic side, broader on acroscopic, edges entire, texture thin, veins fine, distinct on both surfaces. Fertile pinnae to 9 cm by 3 mm, on stalks to 2 mm long.