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

192. Polystichum rupicola Ching ex W. M. Chu, Acta Bot. Yunnan., Suppl. 5: 51. 1992.

岩生耳蕨 yan sheng er jue

Plants evergreen. Rhizome erect, short, together with stipe base 1-1.5 cm in diam., rhizome apex scales and basal stipe scales dark brown, broadly lanceolate, thickly membranous, sparsely toothed. Fronds 15-32 cm; stipe stramineous, 3-8 cm, less than 1 mm in diam., sparsely scaly from stipe base to rachis; scales dark brown, lanceolate to narrowly lanceolate, mixed with few smaller scales; smaller scales appressed, dark brown, ovate, thinly membranous, with sparse short to long teeth. Lamina 1-pinnate, light brownish green or grayish green when dry, adaxially darker, linear-lanceolate, 15-25 × 2-3 cm at middle, broader at middle, base slightly contracted, apex pinnatipartite and long acuminate, sometimes pinnatilobate and shortly acuminate; rachis stramineous, without proliferous bulbils. Pinnae 15-20 pairs, mostly widely remote, slightly angled acroscopically or attached at nearly right angles with rachis, very shortly stalked, oblong, apex rounded-truncate, middle pinnae 1-2 cm × 4-7 mm, basal pinnae 8-11 × 4-6 mm, apices acute and with short spinule angled acroscopically, bases asymmetrical, acroscopic base auriculate, auricles nearly semicircular and with 1 short acute tip at apex or 1-3 low spinulose teeth on margin, acroscopic margins nearly truncate and with 4-6 deep or shallow obtuse teeth, basal basiscopic margins truncate, margins entire, distal basiscopic margins abruptly curved upward, with 3 or 4 shallow teeth (sometimes repand), teeth obtuse or shortly spinulose at apex; pinnae or lobes near lamina apex strongly angled acroscopically, almost parallel to rachis, apex often hooked and pointing to rachis, basiscopic margins nearly semicircular; adaxially glabrous, abaxially sparsely scaly; microscales appressed, light brown, ovate, thinly membranous; frond texture papery or thinly leathery. Sori small, terminal on shorter veinlets, close to pinna margin, 1-4(-6) above midrib, 1-3 below midrib and only on upper part; indusia present, dark brown, subentire, evanescent.

● Montane wet limestone crevices; 1500-2800 m. NW Yunnan (Gongshan, Lijiang) [?N Myanmar].


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