Teratophyllum luzonicum Holttum

Bathyphylls very like those of T. rotundifoliatum (fronds 1.5 cm long not dimidiate); transition bathyphylls bipinnate, larger pinnules with one rounded or slightly bifid lobe on acroscopic side. Adult rhizome c. 4 mm ø, somewhat spiny. Sterile acrophylls to 60 cm long including stipe, with 8 or more pairs of pinnae; pinnae to 15 by 3 cm, on stalks to 12 mm long, base broadly and slightly unequally cuneate, sides nearly parallel except in distal third, apex acuminate, texture firm, drying green, veins near midrib 1.5-2 mm apart. Fertile acrophylls with pinnae to 10 cm long and 3 mm wide, on stalks to 5 mm long.

At 600-700 m (Jacobs 7944, Sierra Madre Mts; sterile and fertile acrophylls).