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Leymus mollis
''Leymus mollis'' (syn. ''Elymus mollis'') is a species of grass known by the common names American dune grass, American dune wild-rye, sea lyme-grass, strand-wheat,〔Higman, P. J. and M. R. Penskar. 1999. (Special plant abstract for ''Leymus mollis'' (American dune wild-rye). ) Michigan Natural Features Inventory, Lansing, MI.〕 and strand grass.〔(''Leymus mollis''. ) Germplasm Resources Information Network.〕 Its Japanese name is ''hamaninniku''.〔(Plant propagation protocol for ''Leymus mollis'' ssp. ''mollis''. ) Propagation Protocols for Pacific Northwest Plants. University of Washington. 2008.〕 It is native to Asia, where it occurs in Japan, China, Korea, and Russia, and northern parts of North America, where it occurs across Canada and the northern United States, as well as Greenland.〔〔 It can also be found in Iceland.〔
==Growth patterns==
This is a rhizomatous perennial grass with erect stems growing up to 1.7 meters tall. The leaf blades can be nearly a meter long in ssp. ''mollis'', and up to 1.5 centimeters wide. The flower spike is up to 34 centimeters long by 2 wide. Each spikelet may be up to 3.4 centimeters long and contain up to six florets. There are two subspecies. Subspecies ''villosissimus'' is mostly limited to arctic regions, and is mainly coastal. It is usually a smaller plant than ssp. ''mollis''.〔(''Leymus mollis''. ) Grass Manual Treatment.〕 The two subspecies are otherwise hard to tell apart, even when growing sympatrically. The most reliable character to use to distinguish them is the type of hairs on the glumes and lemmas;〔Aiken, S. G., et al. 2007. (''Leymus mollis'' ssp. ''villosissima''. ) Flora of the Canadian Arctic Archipelago: Descriptions, Illustrations, Identification, and Information Retrieval. NRC Research Press, National Research Council of Canada, Ottawa.〕 ssp. ''villosissimus'' has long, soft, sometimes shaggy hairs (''villous''), while ssp. ''mollis'' has fine, thin hairs (''pilose''), and generally fewer of them.〔 There is no awn.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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