Northeastern Asian Flora
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Ophioglossum thermale Kom.  
Family: Ophioglossaceae
[Ophioglossum angustatum Maxon, moreOphioglossum japonicum Thunb., Ophioglossum litorale Makino, Ophioglossum nipponicum Miyabe & Kud?,",",",",",",",OPHNIP1", Ophioglossum savatieri Nakai, Ophioglossum thermale var. nipponicum (Miyabe & Kud? M.Nishida, Ophioglossum vulgatum var. thermale C.Chr.]
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  • Japan Flora
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Japan Flora: Stipes 7-20 cm. long; sterile blade broadly linear to oblong or navicular, 1*3 (-5) cm. long, 0.3-1 cm. wide, obtuse to acute at apex, narrowly cuneate at base, sessile or indistinctly short-petiolate; venation fine, with small oblong areoles and a few secondary free veinlets.------------ Apr.-Dec. Wet sandy sea­shores.

Hokkaido, Honshu, Shikoku, Kyushu. Formosa and Kamchatka.

var. nipponicum (Miyabe & Kudo) Nishida. Sterile blade thinner, usually oblong, sometimes elliptic, more often lanceolate, 2.5-6 cm. long, 1-2 cm. wide, distinctly short-petiolate. Sunny ground in inland areas; Hokkaido, Hon­shu, Shikoku, Kyushu. Korea and China.

Ophioglossum thermale
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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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