糙叶毛蕨 cao ye mao jue

Christella scaberula (Ching) Holttum; Thelypteris scaberula (Ching) C. F. Reed.

Plants 70-100 cm tall. Rhizomes shortly creeping, with dark brown linear-lanceolate scales. Fronds approximate; stipes 30-45 cm, dark stramineous, subglabrous or with sparse scales to middle of rachises; laminae 40-60 × 15-30 cm, bases not narrowed or slightly narrowed, apices caudate to acuminate; pinnae 10-20 pairs, subsessile; middle pinnae 8-15 × 1.5-2.5 cm, lobed 1/3-2/5 toward costae, lanceolate, bases rounded-truncate, apices long acuminate; segments 20-35 pairs on middle pinnae, triangular, 3-4 × 2-4 mm, obtuse or acute at apices; veinlets 8-11 pairs, proximal 2 pairs anastomosing, next 1-1.5 pairs running to sinus membrane. Laminae papery, grayish green to brownish green when dried, adaxially with several acicular hairs along costae and veins, also with minute hairs between veins, abaxial surface with minute hairs throughout (sometimes with several scales on costae). Sori orbicular, medial to supramedial; indusia glabrous or shortly hairy. Sporangia bearing reddish orange glands on stalks. Spores echinate or shortly cristate. 2n = 72.

● Nearby streams, wet places in dense forests; 700-1200 m. Hainan.