Northeastern Asian Flora
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Acorus gramineus Sol.  
Family: Acoracae
[Acorus gramineus var. japonica M.Hotta, moreAcorus gramineus var. japonicus M.Hotta, Acorus gramineus var. macrospadiceus Yamam., Acorus gramineus var. pusillus (Siebold) Engl., Acorus humilis Salisb., Acorus macrospadiceus (Yamam.) F.N.Wei & Y.K.Li, Acorus pusillus Siebold, Acorus xiangyeus Z.Y.Zhu]
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  • Japan Flora
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Japan Flora: Rhizomes creeping, 5-8 mm in diameter, much branched; leaves deep green, linear-ensiform, gradually narrowed to an acuminate apex, 30-50 cm. long, 2-6 (rarely 8) mm. wide) shining, with­out a midrib, smooth; peduncle 10-30 cm. long, compressed- triangular, 3-5 mm. wide; bract (spathe) leaflike, rather short, 7-15 cm. long, 2-5 mm. wide, erect; spadix ascending to nearly erect, narrowly cylindric, terete, 5-10 cm. long, 3-4 mm. thick, densely flowered, yellow. Apr.-May. Com­mon in wet places along streams and around ponds.

Honshu, Shikoku, Kyushu. Formosa, China, and India.

var. pusillus Engl. Smaller in all respects. Much-prized as an ornamental pot­plant, with numerous cultivars. Introduced from China.

 

Acorus gramineus
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National University and Korea National Arboretum of Korea Forest Service.
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