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

9. Polystichum exauriforme H. S. Kung & Li Bing Zhang, Acta Bot. Yunnan. 17: 27. 1995.

缺耳耳蕨 que er er jue

Plants evergreen. Rhizome erect. Fronds ca. 60 cm; stipe stramineous, 26-28 cm, ca. 4 mm in diam. at base, scaly; scales dark brown, linear and lanceolate, lower part of stipe mixed with larger scales; larger scales dark brown, ovate-lanceolate. Lamina bipinnate, oblong-lanceolate, 33-37 × 12-14 cm, slightly contracted toward base, apex acuminate; rachis stramineous, densely scaly abaxially, without proliferous bulbils; scales dark brown, linear with dilated bases, margins ciliate. Pinnae 20-24 pairs, alternate, attached at nearly right angles to rachis, shortly stalked, lanceolate, middle pairs 6.5-7 × 1.8-2.2 cm, bases oblique, acroscopic margins truncate, basiscopic margins broadly cuneate, pinnate, apices acuminate. Pinnules 6-9 pairs, alternate, ascendant, lower pairs shortly stalked, obliquely oblong, 1.2-1.8 cm × 5-8 mm, thinly leathery, obliquely cuneate, acroscopic bases exauriculate, margins entire, apices acute; basal acroscopic pinnules largest, obliquely ovate, acroscopic margins slightly toothed; both surfaces glabrous; venation pinnate on pinnule, abaxially concave, adaxially indistinct. Sori in 1 row on each side of pinnule midrib; indusia present, toothed.

● Forests on basic soils; ca. 2600 m. Sichuan (Jiulong).


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