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

121. Polystichum basipinnatum (Baker) Diels in Engler & Prantl, Nat. Pflanzenfam. 1(4): 189. 1899.

基羽鞭叶耳蕨 ji yu bian ye er jue

Aspidium basipinnatum Baker, J. Bot. 27: 176. 1889; Cyrtomidictyum basipinnatum (Baker) Ching.

Plants evergreen. Rhizome erect, short, together with basal stipe densely scaly; scales brown, ovate and lanceolate, membranous, margins densely ciliate, apices filiform. Fronds dimorphic, 30-40 cm; stipe brownish stramineous, 6-16 cm, 1.5-2 mm in diam. at middle; distal stipe scales sparser and smaller. Fertile lamina dark brown when dry, linear-lanceolate, 15-20 × 2.2-3.5 cm at middle, base widest and nearly truncate or shallowly cordate, pinnatipartite in lower part and gradually less pinnatifid toward lamina apex, apex long acuminate; rachis stramineous, without proliferous bulbils, sparsely scaly abaxially; scales similar to distal stipe scales, lanceolate or linear, margins toothed, apices filiform. Pinnae 10-25 or more pairs, alternate, angled slightly acroscopically; basalmost pairs oblong, attached at nearly right angles with rachis, sessile, 1.3-1.8 × ca. 1 cm, bases nearly rounded, acroscopic base not auriculate, margins entire or slightly repand, basal basiscopic margins cuneate and forming a ± 80° angle with rachis, distal basiscopic margins curved upward, apices obtuse; other lobes gradually smaller toward lamina apex, ascendant; abaxially densely scaly along costae and midribs, adaxially glabrous and slightly shiny; microscales light brown, ovate and linear, margins ciliate, apices filiform; frond texture thinly leathery; venation pinnate, lateral veins 2- or 3-forked, distinct on both surfaces, reaching lobe or lamina margins. Sori small, in 1 row on each side of midrib, abaxial on veinlets, medial, whole fertile lamina fertile or lower part of fertile lamina sterile, exindusiate. Sterile lamina similar to fertile lamina but less deeply pinnatifid, or simple; rachis apex often elongate and forming a long flagelliform nodding stolon with proliferous scaly bulbil.

● By streams in forests. Guangdong, Guangxi.


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