Psilotum complanatum Sw.

Epiphytic plants. Rhizome branching, creeping. Aerial shoots firm to flaccid or pendulous, branched repeatedly in one plane in the upper part, 15–110 cm long. Branches flattened, 2–4 mm wide; margins slightly thickened; stomata covering both surfaces. Sterile leaves alternate along the margins, c. 1 mm long, appressed, subterete, pale yellow-green, translucent towards the tips. Synangia 1.5–2.5 mm long and wide.

Grows as an epiphyte on the trunks and branches of trees, in Platycerium clumps or on fibrous trunks of palms; to 700 m altitude; widespread in all tropical and subtropical regions.