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FOC | Family List | FOC Vol. 2-3 | Dryopteridaceae | Polystichum

5. Polystichum langchungense Ching ex H. S. Kung, Chin. J. Appl. Environm. Biol. 3(2): 134. 1997.

浪穹耳蕨 lang qiong er jue

Plants evergreen. Rhizome erect, densely covered with brown or blackish brown scales. Fronds 30-50 cm; stipe stramineous, 14-28 cm, 3-4 mm in diam. at base, densely scaly; scales dark brown, narrowly lanceolate, lower part mixed with lanceolate and ovate scales, scale margins ciliate. Lamina bipinnatilobate, narrowly ovate or broadly lanceolate, 30-45 × 10-16 cm at middle, base rounded-cuneate or truncate, apex acuminate; rachis stramineous, without proliferous bulbils, abaxially scaly; scales dark brown, linear with dilated base, margins ciliate. Pinnae 16-25 pairs, alternate, slightly ascendant, shortly stalked, lanceolate, middle pairs 6.5-10 × 1.5-2 cm, bases oblique, acroscopic margins truncate, basiscopic margins broadly cuneate, pinnatilobate nearly to costa except acroscopic bases with 1 or 2 pairs of free pinnules, apices long acuminate or nearly caudate. Lobes 10-14 pairs, alternate, ascendant, oblong or ovate, lower pairs 8-13 × 4-5 mm, acroscopic bases almost exauriculate, margins with small acute teeth or subentire, apex acute and mucronate; sparsely scaly; scales yellowish brown, filiform with dilated base; frond texture leathery or thinly leathery; venation pinnate on lobes, lateral veins forked, slightly visible abaxially, indistinct adaxially. Sori in 1 row on each side of midrib; indusia present, irregularly obtusely toothed.

● Forests; 400-2200 m. Guizhou, Sichuan (margins of Sichuan Basin), C and W Yunnan.

"Polystichum fengjieense" (Ching in S. F. Wu in W. T. Wang, Keys Vasc. Pl. Wuling Mts. 58. 1995) belongs here but is a nomen nudum and was not therefore validly published (Melbourne Code, Art. 38.1(a)).


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