Plants medium-sized to large. Rhizome usually robust and erect, brown, ca. 2 cm in diam., woody, occasionally creeping, apex like base of stipe, densely scaly; scales brown, linear-lanceolate to linear-diamond-shaped, ca. 8 mm, membranous, margin black, sparsely toothed, apex curly and filiform; fronds often caespitose, rarely approximate or sparse. Fertile fronds up to 1.5 m; stipe brown at base, upward green-stramineous, 30-80 cm, up to 1 cm in diam., base densely scaly, upward gradually glabrous, broadly grooved adaxially; lamina 1-pinnate, oblong, 50-90 × 25-50 cm, base mostly pinnatipartite, apex deltoid, abruptly shortened and acuminate; lobes with acuminate or long acuminate apex; upward pinnatifid to pinnatilobate, lobes acute or rounded at apex; lateral pinnae 7-9 pairs, alternate, ascending, with stalk ca. 5 mm, base slightly asymmetrical, shallowly cordate, few nearly symmetrical, rounded-cuneate, margin with few sinuses or serrate, apex acuminate; veins prominent, slightly raised on both surfaces, pinnate, ascending, veinlets 4-6 on either side of main veins, ascending, simple, basiscopic 2 or 3 veinlets not reaching pinna margin. Lamina papery, usually dark green when dry, glabrous on both surfaces; rachis stramineous, glabrous, shallowly grooved adaxially; costa abaxially with sparse linear brown scales. Sori linear, 3-6 mm, 3 or 4 pairs per vein group, mostly single or sometimes double, inframedial or medial; indusia gray, linear, membranous, entire. Spores bean-shaped, perispore prominent, few rugate. Similar to D. accedens in general habit, trichomes, and pinnation, but differs in: lateral pinnae rounded to subtruncate or rarely subcordate at base; rachis not gemmiferous; veins free or very rarely irregularly anastomosing, all except the basal pairs of veinlets running to the margin of lobes. Along streamlets in moist evergreen forests at about 800 m alt. Thailand, E. Burma, SW. China (Kwangsi, Kweichow, Yunnan), Taiwan, Vietnam (Tonkin, type) and Annam. Along streamlets in moist evergreen forests at about 800 m alt. Thailand, E. Burma, SW. China (Kwangsi, Kweichow, Yunnan), Taiwan, Vietnam (Tonkin, type) and Annam. Similar to D. accedens in general habit, trichomes, and pinnation, but differs in: lateral pinnae rounded to subtruncate or rarely subcordate at base; rachis not gemmiferous; veins free or very rarely irregularly anastomosing, all except the basal pairs of veinlets running to the margin of lobes. Plants medium-sized to large. Rhizome usually robust and erect, brown, ca. 2 cm in diam., woody, occasionally creeping, apex like base of stipe, densely scaly; scales brown, linear-lanceolate to linear-diamond-shaped, ca. 8 mm, membranous, margin black, sparsely toothed, apex curly and filiform; fronds often caespitose, rarely approximate or sparse. Fertile fronds up to 1.5 m; stipe brown at base, upward green-stramineous, 30-80 cm, up to 1 cm in diam., base densely scaly, upward gradually glabrous, broadly grooved adaxially; lamina 1-pinnate, oblong, 50-90 × 25-50 cm, base mostly pinnatipartite, apex deltoid, abruptly shortened and acuminate; lobes with acuminate or long acuminate apex; upward pinnatifid to pinnatilobate, lobes acute or rounded at apex; lateral pinnae 7-9 pairs, alternate, ascending, with stalk ca. 5 mm, base slightly asymmetrical, shallowly cordate, few nearly symmetrical, rounded-cuneate, margin with few sinuses or serrate, apex acuminate; veins prominent, slightly raised on both surfaces, pinnate, ascending, veinlets 4-6 on either side of main veins, ascending, simple, basiscopic 2 or 3 veinlets not reaching pinna margin. Lamina papery, usually dark green when dry, glabrous on both surfaces; rachis stramineous, glabrous, shallowly grooved adaxially; costa abaxially with sparse linear brown scales. Sori linear, 3-6 mm, 3 or 4 pairs per vein group, mostly single or sometimes double, inframedial or medial; indusia gray, linear, membranous, entire. Spores bean-shaped, perispore prominent, few rugate.General Information
Source: [
Source: [
Ecology
Source: [
Distribution
Source: [
e-Flora of Thailand
EcologyFlora of China @ efloras.org
General Information
