The World Flora Online

Plants 25-40 cm tall. Rhizome long creeping, with bright brown, ovate-lanceolate thin scales at apex. Fronds remote; stipe dark brown at base, stramineous distally, 15-30 cm, sparsely scaly, nearly smooth; lamina bipinnatifid, deltoid, 13-20 × 10-18 cm, acuminate and pinnatifid at apex; pinnae ca. 10 pairs, usually opposite, spreading, lanceolate, 5-9 × 1-2 cm, basal pair largest, bases slightly or not tapering, free from second pair of pinnae, slightly deflexed, apices acuminate; segments oblong, entire, undulate, or lobed along margins, rounded or obtuse at apices; distal pinnae gradually shortened, bases connected along rachises by triangular wings. Veins pinnate, lateral veins simple or occasionally forked. Fronds herbaceous or papery, drying gray-green or yellowish green, with sparse gray-white acicular hairs on both surfaces, ± with small scales along rachises and costae; scales brownish, ovate-lanceolate and ciliate along margins. Sori ovate-orbicular or orbicular, borne at or near ends of ultimate veins and close to margins. Sporangia with 1 or 2 hairs near annulus. 2n = 60, 90.

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• 1
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Stems long-creeping, 1--2(--3) mm diam. Leaves monomorphic, dying back in winter, often 1--2 cm apart, 15--60 cm. Petiole straw-colored, (8--)15--36 cm × 1--3 mm, at base with scales brownish, lanceolate, glabrous or sparingly hairy on margin. Blade narrowly to broadly deltate, usually somewhat longer than broad, (6--)12--25 cm, proximal pinnae longest and slightly narrowed at base, spreading or reflexed. Pinnae deeply pinnatifid, (3--)6--12 × 1--3.3 cm, lowermost 1--2 pairs separate, sessile, more distal pairs strongly adnate and connected by narrow rachis wing; segments entire, or those of proximal pinna pair sometimes crenate, uncommonly shallowly lobed; proximal pair of veins from adjacent segments meeting margin above sinus, veins simple or sometimes forked in lowermost pinnae. Indument abaxially of moderately to densely set hairs 0.3--1 mm along costae, veins, and blade tissue, costae also with scales light tan to shiny brown, ovate-lanceolate, spreading, to ca. 3 mm, scales sometimes sparingly hairy on margin. Sori subterminal on veins. n = 2 n = 90, apogamous.

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• 2
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16-50 cm uzunluğunda, dik veya yükselici bitkiler. Rizom uzun, zayıf, sürünücü, seyrek ölü yapraklar kalıntılarıyla kaplı, siyah. Yaprak sapı 9-30 cm uzunluğunda, seyrek tüylü ve tabanda pullu, saman rengi ilâ kahverengi, ayanın yaklaşık 3/5’i kadar; aya 7-20 cm uzunluğunda, 2 azteleksi, üç köşeli, bezesiz; telek 15-25 çift, mızraksı, 3-6 × 0,7-1,3 cm, yukarıya doğru giderek azalır, üstteki telekler daha kısa, alttaki çiftler geriye kıvrık; telekçik 10-15 çift, dikdörtgensi veya mızraksı, 0,3-0,7 × 0,1-0,3 cm, tüylü, kenarı hafifçe fırfırlı; damarlanması teleksi, telekçiklerin kenarına kadar; sorus 0,5-1 mm, yuvarlak, telekçiklerin kenarına yakın, olgunlukta dağılır; spor kesesi seyrek tüylü; tüyler halkaya yakın, indizyumsuz.

Blätter 10–30 cm lang, 3eckig bis pfeilförmig, hellgrün, behaart, einfach gefiedert, mit fiederteiligen Abschnitten, unterstes Fiederpaar schräg abwärts gerichtet, obere Fiederpaare am Grund miteinander verbunden. Blattstiel länger als die S

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• 6
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6–9. Wälder, Hochstaudenfluren, kollin-subalpin. CH.

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• 6
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