Common Field Horsetail
Equisetum arvense L.

Equisetum arvense, known as Common Field Horsetail, is a species in the Equisetaceae family. It is native to the arctic and temperate regions of the Northern Hemisphere. The plant has two distinct growth forms: a fertile spore-bearing stem and a sterile green stem. It is sometimes confused with Hippuris vulgaris.
Description
Equisetum arvense L. is a vascular plant in the Equisetaceae family, native to the arctic and temperate regions of the Northern Hemisphere. It is commonly known as Common Field Horsetail. The species has two distinct growth forms: a fertile spore-bearing stem and a sterile green stem. It is distributed in regions such as Greenland, Labrador, Newfoundland, and other parts of North America, as well as Açores, Portugal Continental, and São Miguel Island. The species was published in 1753. There has been discussion regarding the type specimen, with Hauke suggesting a neotype, but Jonsell & Jarvis rejected this in favor of a Clayton collection.
Other common names
Common Field HorsetailCommon HorsetailField HorsetailScouringrushWestern Horsetail
Distribution
Greenland · Labrador · Newfoundland · Alberta · British Columbia · Manitoba · New Brunswick · Nova Scotia · Northwest Territories · Nunavut · Ontario · Prince Edward Island · Quebec · Saskatchewan · Yukon · Saint Pierre and Miquelon · Açores · Portugal Continental · São Miguel Island · DK · FI · IS · NO · SE · BR · MX · MU · Flanders · Azores · Bulgaria
Synonyms
Equisetum arvense var. arvenseEquisetum arvense f. arvenseEquisetum arvense var. nemorosumEquisetum arvense var. nudumEquisetum arvense var. ramulosumEquisetum arvense var. proliferum
