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

92. Polystichum kangdingense H. S. Kung & Li Bing Zhang ex Li Bing Zhang, Phytotaxa. 60: 58. 2012.

康定耳蕨 kang ding er jue

Plants summer-green. Rhizome erect, densely covered with lanceolate brown scales. Fronds 35-60 cm; stipe stramineous, 14-28 cm, 3-4 mm in diam. at base, densely scaly; scales brown, lanceolate and linear, mixed with larger scales; large scales ovate, blackish brown at middle, margins brown. Lamina bipinnate, broadly lanceolate, 35-54 × 8-14 cm, slightly contracted toward base, acuminate; rachis without proliferous bulbils, stramineous, both surfaces densely covered with lanceolate and linear scales, abaxially mixed with ovate scales. Pinnae 20-30 pairs, alternate, attached at nearly right angles to rachis, shortly stalked, lanceolate or linear-lanceolate, middle pairs 4-7 cm × 1.2-2.4 mm, bases obliquely broadly cuneate, auriculate acroscopically, pinnate, apices acuminate. Pinnules 8-12 pairs, alternate, ascendant, obliquely ovate, 6-14 × 4-8 mm, bases obliquely cuneate and decurrent to pinna rachis, auricles deltoid, margins with small acute forward-pointing teeth, apices acute; abaxially more densely covered with filiform microscales, adaxially sparsely covered with filiform microscales; frond texture papery; venation pinnate on lobes, indistinct abaxially, slightly raised adaxially. Sori in 1 row on each side of pinnule midrib; indusia present, erose.

● Alpine dark coniferous forests, shrubs, bamboo forests; 2000-3800 m. W Sichuan.

Polystichum kangdingense H. S. Kung & Li Bing Zhang (Acta Phytotax. Sin. 36: 254, t. 3: f. 1-4. 1998) was not validly published because no type was indicated (Melbourne Code, Art. 40.1).


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