台湾金星蕨 tai wan jin xing jue

Dryopteris castanea Tagawa, Acta Phytotax. Geobot. 4: 132. 1935; Thelypteris castanea (Tagawa) Ching; Parathelypteris castanea (Tagawa) Ching, Acta Phytotax. Sin. 8: 302. 1963.

Plants ca. 70 cm tall. Rhizomes short and ascending, black. Fronds clustered; stipes with bases black, distally castaneous-brown, polished, throughout covered with dense glaucous short acicular hairs; laminae narrowly oblong, ca. 30 × ca. 14 cm, bases not tapering, pinnate-pinnatifid, apices acuminate and pinnatifid; pinnae 15-17 pairs, opposite or alternate distally, spreading, sessile, proximal several pairs not shortened, lanceolate, ± falcate, 7-8 × ca. 1.4 cm, bases slightly tapering, truncate, pinnatifid and reaching narrow wings on both sides, apices acuminate; segments 15-18 pairs, ca. 6 × 2.8 mm, entire, apices rounded. Veins visible, lateral veins simple, 6 or 7 pairs per segment, proximal pair arising from base of costules. Laminae herbaceous, dark brown when dry, pinnae with dense grayish white short acicular hairs on both surfaces, hairs along costae denser and longer; rachises brown, grayish white pubescent abaxially. Sori orbicular, dorsifixed above middle of lateral veins, slightly closer to margins, 1 pair per segment; indusia smaller, orbicular-reniform, brown, membranous, densely pubescent, persistent.

Wet places in forests. Taiwan [Japan].

Some authors treat this name as a synonym of the preceding species, Parathelypteris japonica (e.g., see Knapp, Ferns Fern Allies Taiwan, 416. 2011, as Thelypteris japonica).