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

93. Polystichum frigidicola H. S. Kung & Li Bing Zhang, Acta Bot. Yunnan. 17: 28. 1995.

寒生耳蕨 han sheng er jue

Plants summer-green. Rhizome ascending, densely scaly; scales blackish brown at middle, margins brown, lanceolate. Fronds 40-50 cm; stipe stramineous, 16-20 cm, 3-4 mm in diam. at base, scaly; scales brown, lanceolate and linear. Lamina bipinnatifid, lanceolate, 30-32 × 5-8 cm, slightly contracted toward base, acuminate; rachis without proliferous bulbils, stramineous, both surfaces densely covered with lanceolate and linear brown scales, abaxially mixed with lanceolate dark brown scales with light brown margins. Pinnae 24-30 pairs, alternate, slightly ascendant, shortly stalked, lanceolate or linear-lanceolate, middle pairs 3.5-5 × 1.2-1.5 cm, bases obliquely broadly cuneate, auriculate acroscopically, pinnatipartite, apices acuminate. Lobes 7-9 pairs, nearly opposite, ascendant, obliquely ovate or lanceolate, 8-12 × 4-5 mm, bases obliquely cuneate and decurrent to costa forming narrow wings, auricles inconspicuous, with small acute forward-pointing teeth, acuminate; abaxially with denser microscales, adaxially sparsely covered with filiform brown microscales; frond texture papery; venation pinnate on lobes, slightly raised abaxially, distinct adaxially. Sori in 1 row on each side of midrib of lobe, or on each side of costa of upper pinnae; indusia present, erose.

● Alpine meadows, Abies-Rhododendron forests; 2900-4400 m. W Sichuan (Luding, Muli, Shimian).


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