Habit: herb
Duration: perennial
Origin: Native
Distribution: Alaska to Oregon, east across southern Canada and the northern tier of states in the United States.
Habitat: Shallow water, marshes and bogs, along muddy shores, from the lowlands to moderate elevations in the mountains.
Duration: perennial
Origin: Native
Distribution: Alaska to Oregon, east across southern Canada and the northern tier of states in the United States.
Habitat: Shallow water, marshes and bogs, along muddy shores, from the lowlands to moderate elevations in the mountains.
Species Description:
General: Rhizomatous annual, the stems not dimorphic, up to 1 m. tall, shallowly 9- to 25-ridged and grooved, the ridges smooth; stomata in a single broad band in each furrow; central cavity large, more than 3/4 the diameter of the stem; sheaths green, 4-9 mm. long, with persistent, sharp, black teeth 1.5-3 mm. long.
Leaves: Branches none to many and whorled, 4- to 6-angled, simple, the first internode shorter than the stem sheath.
Spores: Cone short-pedunculate, blunt, deciduous.
General: Rhizomatous annual, the stems not dimorphic, up to 1 m. tall, shallowly 9- to 25-ridged and grooved, the ridges smooth; stomata in a single broad band in each furrow; central cavity large, more than 3/4 the diameter of the stem; sheaths green, 4-9 mm. long, with persistent, sharp, black teeth 1.5-3 mm. long.
Leaves: Branches none to many and whorled, 4- to 6-angled, simple, the first internode shorter than the stem sheath.
Spores: Cone short-pedunculate, blunt, deciduous.
Accepted Name:
Equisetum fluviatile L.Synonyms:
Equisetum limosum L.
Treated in Flora of the PNW as:
Equisetum fluviatile
Additional Resources:
PNW Herbaria Specimens: View list of Equisetum fluviatile specimens in the Consortium of Pacific Northwest Herbaria database.
WTU Herbarium Specimens: View list of Equisetum fluviatile specimens in the WTU Herbarium database.
Washington Flora Checklist: Equisetum fluviatile treatment.
E-Flora BC: Equisetum fluviatile atlas page.
CalPhotos: Equisetum fluviatile images.
USDA Plants Database: Equisetum fluviatile.
Ben Legler, 2004
Ben Legler, 2004
Ben Legler, 2004
Ben Legler, 2004
Ben Legler, 2004
Ben Legler, 2004
Bud Kovalchik
Bud Kovalchik
Bud Kovalchik
Bud Kovalchik
Craig Althen, 2010
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 WA Native Plant Society |
