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''Eleocharis acicularis'' is a species of spikesedge known by the common names needle spikerush and dwarf hairgrass. It is widespread across Europe, central and southeastern Asia, North America and northeastern South America as far south as Ecuador.〔(Kew World Checklist of Selected Plant Families )〕 It is also found in Australia, where it is probably an introduced species.〔(Flora of North America, Vol. 23 Page 108, ''Eleocharis acicularis'' (Linnaeus) Roemer & Schultes in J. J. Roemer et al., Syst. Veg. 2: 154. 1817. )〕 ''Eleocharis acicularis'' is an annual or perennial spikesedge with long, grasslike stems to about 15 centimeters in height, shorter in bog conditions, from a creeping rhizome. In shallow water it will form short spikes of tiny flowers amongst flat overlapping bracts. The tiny flowers are less than five millimeters in diameter and are borne at the tip of each stem in single, sharply pointed, lanceoloid spikelets up to about six millimeters long. This is a plant of marshes, vernal pools, and bogs.〔 ''Eleocharis acicularis'' is sold commercially as a aquascape plant suitable for inclusion in artificial aquatic environments. It thrives with plenty of light and a high concentration of carbon dioxide.〔Roe, Colin D. (1967), ''A Manual of Aquarium Plants'', Shirley Aquatics, Solihull〕〔(Aquascaping World Plantpedia, ''Eleocharis acicularis'' )〕 ==Varieties== Two varieties are recognized:〔 #''Eleocharis acicularis'' var. ''acicularis'' - most of species range #''Eleocharis acicularis'' var. ''porcata'' S.G.Sm. - western North America from Alberta south to New Mexico and Louisiana 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Eleocharis acicularis」の詳細全文を読む スポンサード リンク
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