Northeastern Asian Flora
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Hymenophyllum riukiuense Christ  
Family: Hymenophyllaceae
[Hymenophyllum taiwanense (Tagawa) C.V. Morton, moreMecodium riukiuense (Christ) Copel., Mecodium taiwanense Tagawa]
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  • Japan Flora
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Japan Flora: Rhizomes creeping, nearly filiform; fronds 5-10 cm. long, 17-30 mm. wide; stipes at first with an entire, soon crispate-undulate wing on both sides; blades nar­rowly ovate, sometimes somewhat elongate and narrowed at tip, 3-pinnatiparted, the rachis winged; ultimate pinnules or segments narrow, linear, 0.5-1 mm. wide, obtuse; valves of indusia ovate to elliptic, few-toothed on upper margin, about 1 mm. wide. 

Shikoku, Kyushu (s. distr.); rare. Ryukyus.

Hymenophyllum riukiuense
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Development supported by College of Agriculture and Life Sciences of Seoul
National University and Korea National Arboretum of Korea Forest Service.
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