Equisetum fluviatile L.
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Equisetaceae
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Scientific Name
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Description
Species Description - Stems annual, all alike, to 1 m or more, shallowly 9–25-ridged, the ridges smooth or nearly so, the stomates in a single broad band in each furrow; central cavity commonly more than ¾ the diameter of the stem, the vallecular cavities commonly lacking except near the base; sheaths green, 4–9 mm, with persistent, narrow, sharp, black or blackish teeth 1.5–3+ mm, these not or scarcely hyaline- margined; branches none to often numerous and whorled at the middle and upper nodes, 4–6-angled, simple, the first internode slightly shorter than the associated stem-sheath; cone pedunculate, 1–2 cm, deciduous. In shallow water, along muddy shores, and in marshes and bogs; circumboreal, in Amer. s. to Pa., Ill., Io., Nebr., and Wash.
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Common Names
water-horsetail