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Streambanks and other moist or wet places.
Circumboreal, south in America to FL, CA, and Central America.
Fertile and sterile stems alike, evergreen, mostly unbranched, erect, 4-14 mm diameter; ridges mostly 16-50, broad, rounded; central cavity at least 75% of the diameter of the stem; stomates in 2 rows in each furrow; sheaths black-banded above and usually also at or near the base; sheath teeth dark, scarious-margined, basally connate, irregularly persistent; strobili short-pedunculate, 1-2.5 cm, apiculate.
Strobilli produced May and June
Wetland indicator: FAC
Our plants are var. affine which tends to have less persistent sheath teeth. Can hybridize with other Equisetum spp.
Gleason, Henry A.
and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States
and Adjacent Canada. Second Ed.
The New York Botanical Garden. Bronx, NY
Michael Hough © 2018