大羽新月蕨 da yu xin yue jue

Polypodium nudatum Roxburgh, Calcutta J. Nat. Hist. 4: 491. 1844; Abacopteris multilineata (Wallich ex Hooker) Ching; Aspidium moulmeinense (Beddome) Christ; A. multilineatum (Wallich ex Hooker) Christ (1897), not Mettenius (1858); Christella moulmeinense (Beddome) H. Léveillé; Cyclosorus moulmeinensis (Beddome) Tardieu & C. Christensen; C. multilineatus (Wallich ex Hooker) Tardieu & C. Christensen; Dryopteris moulmeinensis (Beddome) C. Christensen; Goniopteris lineata (Colebrook ex Hooker) Beddome; G. multilineata (Wallich ex Hooker) Beddome; Nephrodium moulmeinense Beddome; N. multilineatum (Wallich ex Hooker) Beddome; Phegopteris lineata (Colebrook ex Hooker) Mettenius; P. multilineata (Wallich ex Hooker) Luerssen; Polypodium lineatum Colebrook ex Hooker; P. multilineatum Wallich ex Hooker; Thelypteris multilineata (Wallich ex Hooker) C. V. Morton; T. nudata (Roxburgh) C. V. Morton.

Plants to 2.5 m tall. Rhizomes strong, creeping, woody, dark brown, with sparse broadly lanceolate scales. Fronds remote; stipes 50-80(-140) cm, bases with brown scales, distally glabrous, dark brown, distally brownish; laminae broadly ovate-oblong, 60-90 × 26-40(-60) cm, 1-imparipinnate; lateral pinnae 8-14(-16) pairs, obliquely spreading, alternate, subsessile, pinnae on low and middle parts broadly linear-lanceolate, 26-30(-35) × 3-4(-5) cm, bases somewhat rounded or cuneate, margins regularly shortly and sharply serrate, apices long acuminate; distal pinnae slightly shortened; terminal pinna of similar shape as middle ones, slightly shorter, bases with both sides not symmetrical, stalk ca. 1 cm. Veins evident, veinlets raised on both sides, spreading or obliquely spreading and parallel to each other, veinlets obliquely spreading distally, raised abaxially and forming triangular areoles between veinlets, distally forming juxtaposed rhomboid areoles. Laminae herbaceous when dry, green or grayish green, abaxial surface with sparse short setae along veins, also along both sides of rachises and costae, abaxial surface foveolate on intercostal areas. Sori orbicular, attached on middle of veinlets, arranged in 2 rows between costules; indusia small, shortly hairy adaxially. Sporangia glabrous.

Shaded sparse forests on slopes; 100-1600 m. Guizhou, Xizang, Yunnan [Bhutan, N India, Indonesia, Myanmar, Nepal, Philippines, Vietnam].

Polypodium lineatum Colebrook ex Wallich (Numer. List, no. 300. 1829, nom. nud.) and Goniopteris lineata C. Presl (Tent. Pterid. 183. 1836, nom. nud.) belong here. The taxon was validated by Hooker in 1864 as P. lineatum. Beddome named the taxon Nephrodium moulmeinense because of the blocking name N. lineatum (Blume) Beddome.