Blechnum chambersii Tindale

Rhizome erect to suberect. Fronds dimorphic, 12-65 cm long, 2-10 cm wide. Stipe 2-15 cm long, stramineous, becoming purplish black towards the base; scales linear-lanceolate, subulate, broadly based, entire, reddish brown. Lamina narrowly linear-lanceolate, pinnate, with 17-40 or more pairs of pinnae. Rachis and costae stramineous, often dark purplish towards base on undersurface, glabrous or with very sparse short acuminate reddish brown scales. Sterile pinnae oblong, falcate, obtuse to acuminate, 1.5-3.2 cm long, 5-10 mm wide, adnate with broad bases; margins crenate to serrate; basal pinnae shorter and more obtuse. Fertile pinnae linear, 1.2-4.5 cm long, 1-2.5 mm wide, reduced and often sterile towards lamina base. Spores 37 × 27 µm; perine scaberulous to granulose; exine smooth to granulose.

Grows in areas of constant high humidity, such as gullies, stream banks and cave entrances, often found in the spray zone of waterfalls.

It can be grown from spores on sphagnum moss.