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

106. Polystichum tangmaiense H. S. Kung & Tateishi, Acta Phytotax. Sin. 32: 268. 1994.

通麦耳蕨 tong mai er jue

Plants evergreen. Rhizome erect or ascending, short, densely covered with linear brown scales. Fronds ca. 25 cm; stipe yellowish brown, 9-12 cm, ca. 1.8 mm in diam. at base, sparsely covered with linear brown scales. Lamina bipinnate, oblong-lanceolate, 17-24 × 6-7 cm at middle, lower part gradually contracted, base fertile, apex acuminate, sterile; rachis without proliferous bulbils, abaxially covered with linear brown scales. Pinnae 8-10 pairs, alternate, slightly ascendant, shortly stalked, lanceolate, middle pinnae 3-4 × 0.8-1.5 cm, not contracted at base, 1-pinnate, acuminate; costa adaxially sulcate, abaxially sparsely covered with linear brown scales. Pinnules 7-9 pairs, alternate, shortly stalked, oblong, 5-8 × 2.5-4 mm, bases cuneate, with deltoid auricles acroscopically, margins shallowly toothed, apices acute; basal acroscopic pinnules largest; abaxially with shortly filiform microscales, adaxially subglabrous; frond texture papery; venation pinnate, lateral veins 5-8 pairs, dichotomous, distinct. Sori 2-4 pairs per pinnule, in 1 row on each side of midrib, close to midrib, terminal on veinlets; indusia present, repand.

● Forests; ca. 2000 m. Xizang (Bomi).


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