有齿金星蕨 you chi jin xing jue

Thelypteris serrutula Ching, Bull. Fan Mem. Inst. Biol., Bot. 6: 319. 1936.

Plants ca. 50 cm tall. Rhizomes long creeping, glabrous, apices with sparse dark brown lanceolate scales. Fronds approximate or remote; stipes ca. 25 cm, dark stramineous, subglabrous; laminae broadly lanceolate, ca. 25 × 13 cm, not tapering to bases, pinnate-pinnatifid, acuminate and pinnatifid at apices; pinnae ca. 20 pairs, spreading, alternate or subopposite on proximal ones, subsessile, lanceolate, 5-7 × ca. 1.5 cm, bases symmetrical, subtruncate, apices acuminate; proximal pinnae slightly tapering to bases, pinnatifid nearly to costae; segments ca. 18 pairs, spreading, lanceolate, ca. 7 × 2 mm, acute at apices; segments on fertile laminae crenate along margins; sterile ones sharply lobate along margins. Veinlets evident, simple, 6 or 7 pairs per segment, proximal pair arising from bases of costules, with sparse spherical glands abaxially, glabrous, adaxial sides with dense short hairs along costal grooves and on costae. Sori medium-sized, orbicular, 5 or 6 pairs per segment, dorsifixed near ends of veinlets, close to margins; indusia small, orbicular-reniform, brown, membranous, glabrous or occasionally sparsely hairy and deciduous when old. Spores bilateral, orbicular-reniform, perispores few, corrugate.

● Streamsides in forests; ca. 100 m. Guizhou, SW Sichuan, Zhejiang.