Thelypteris caudipinna Ching, Bull. Fan Mem. Inst. Biol., Bot. 6: 288. 1936.

Plants ca. 55 cm tall. Rhizomes not seen. Stipes ca. 28 cm; laminae broadly lanceolate, ca. 27 × 15 cm, pinnatifid-acuminate at apices, bases not narrowed, pinnate-pinnatifid; pinnae 11-13 pairs, proximal 8 or 9 pairs opposite, distal ones alternate, proximal pair reflexed proximally, middle pinnae spreading, distal ones obliquely spreading, sessile; middle pinnae lanceolate, 7-8 × ca. 1.5 cm, not narrowed to bases, pinnatifid nearly to costae, pinnatifid and long acuminate at apices; segments ca. 15 pairs, broadly lanceolate, basal acroscopic one slightly elongated, others ca. 5 × 4 mm, entire, obtuse-pointed at apices. Veins evident, basal acroscopic veinlet on segments reaching bottom of sinus, basiscopic one reaching margin above sinus. Laminae dark brown when dry, papery; abaxially rachises, costae, and veins with long hairs, finely hairy on intercostal areas, adaxially with dense, appressed setae along costal grooves, sparsely setaceous along veins, glabrous on intercostal areas. Sori orbicular, attached above middle of veinlets and closer to margins; indusia orbicular-reniform, brown, hairy, persistent. Spores trilete.

● Hainan.