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FOC | Family List | FOC Vol. 2-3 | Polypodiaceae | Polypodiastrum

1. Polypodiastrum dielseanum (C. Christensen) Ching, Acta Phytotax. Sin. 16(4): 28. 1978.

川拟水龙骨 chuan ni shui long gu

Polypodium dielseanum C. Christensen, Index Filic. 522. 1906, based on P. leuconeuron Diels, Bot. Jahrb. Syst. 29: 203. 1900, not (Fée) Christ (1900); Goniophlebium dielseanum (C. Christensen) Rödl-Linder; P. meyii Christ ["meyi"]; P. wilsonii Christ.

Rhizome long creeping, ca. 5 mm in diam., densely scaly; scales brown, ovate-lanceolate, minutely denticulate at margins, acuminate at base. Fronds remote. Stipe straw-colored, 20-30 cm, densely scaly at base, upward glabrous, rachis and lower part of costa pubescent on both surfaces; lamina pinnate, ovate-lanceolate in outline, 40-60 × 15-25 cm; lateral pinnae 20-30 pairs, basal pinna deflexed, upper pinnae spreading, linear-lanceolate, 10-15 × 0.8-1.2 cm, base adnate and somewhat dilated, margin crenate-serrate, apex acuminate or obtuse; veins anastomosing to form 1 row of areoles on each side of costa, each with included veinlet. Lamina herbaceous, green, abaxial surface with sparse brown ovate-lanceolate scales. Sori orbicular, in 1 row on each side of costa, terminal on included veinlets, medial.

Epiphytic on tree trunks or on rocks; 1500-2100 m. Guizhou, Sichuan, Yunnan [NE India].


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