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

83. Polystichum bomiense Ching & S. K. Wu, Fl. Xizang. 1: 223. 1983.

波密耳蕨 bo mi er jue

Plants summer-green. Rhizome unknown. Fronds ca. 40 cm; stipe brown, longer than 8 cm, densely scaly; scales light brown, lanceolate and linear, mixed with few ovate brown scales. Lamina oblanceolate, 25-38 × 5-6 cm, gradually contracted toward base, bipinnatifid, acuminate; rachis without proliferous bulbils, lower part reddish brown, both surfaces covered with scales; scales light brown, lanceolate and linear, abaxially sparsely mixed with lanceolate brown scales. Pinnae 28-30 pairs, alternate, attached at right angles to rachis, nearly approximate, sessile, narrowly deltoid-ovate, sometimes slightly curved upward and falcate, middle pinnae 2.5-3 × 1.2-1.4 cm, bases broadly cuneate or truncate, auriculate acroscopically, pinnatipartite to pinna rachis, apices obtuse and aristate. Lobes 5-7 pairs, alternate, slightly ascendant, approximate, oblong, apex rounded and aristate, acroscopic margins with obtuse teeth, teeth aristate at tip; microscales on abaxial surface light brown, linear and filiform; microscales on adaxial surface light brown, hairlike; frond texture papery; venation pinnate on lobes, distinct on both surfaces. Sori on upper pinnae, 1-4 per lobe; indusia present, incised.

● Forest margins; ca. 4000 m. Xizang (Bomi).


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