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

34. Arachniodes wulingshanensis S. F. Wu, Keys Vasc. Pl. Wuling Mts. 572. 1995.

武陵山复叶耳蕨 wu ling shan fu ye er jue

Rhizome creeping, succulent at growing apex, ca. 1.5 cm in diam., densely scaly; scales pale brown, broadly lanceolate, 3-5 × 1.5-2 mm, thin and soft. Fronds approximate, to 80 cm; stipe stramineous, to 35 cm, ca. 4 mm in diam., base scaly as rhizome, upward scales diminishing to glabrescent; lamina 2-pinnate, yellowish green when dried, ovate-oblong, ca. 45 × 20 cm, thinly papery, base cuneate, abruptly narrowed, apex forming an acuminate terminal pinna much broader than lateral ones, rachis glabrescent; lateral pinnae ca. 6 pairs, basal 2 pairs opposite, others alternate, with 0.5-1.7 cm stalk, obliquely spreading; lowest pinnae lanceolate, to 18 × 4.5 cm, base rounded-cuneate, apex acuminate; (primary) pinnules ca. 15 pairs, spreading, with ca. 1.5 cm stalk, obliquely rhombic, slightly falcate, 2-2.5 × ca. 1 cm, basal pair slightly smaller, base acroscopically truncate and auriculate, basiscopically cuneate and slightly decurrent, apex acute or acuminate, margin serrate with mucronate teeth; upper pinnae similar in appearance, terminal pinna with shallowly pinnatifid pinnules; axes of pinna (and veins as well) occasionally with a few minute brown linear scales abaxially. Sori terminal on veinlets, 6-8 pairs per ultimate pinnule, medial between midvein and margin; indusia brown, firmly membranous, and entire.

● Forests; 200-400 m. Hunan (Yongshun).


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