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Equisetum arvense L.

Field Horsetail
Equisetaceae

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Protologue: Sp. Pl.: 1061 (1753)
Pronunciation: E-qui-sè-tum ar-vén-se
Etymology: Latin for "horsetail," from equus, horse + seta, bristle + Latin: arvensis, of the fields, meadows or grasslands

Jepson eFlora Treatment

Jepson eFlora Key to Equisetum

SD County Synoptic Voucher


Distribution:
 
Left: S.D. County Plant Atlas (http://sdplantatlas.org). Right: CCH2. Click to see current herbarium records.  

Equisetum arvense --- Common Horsetail --- Equisetaceae
Close-up of major aerial shoot, showing whorl of laterally connate leaves and lateral branches.

Equisetum arvense --- Common Horsetail --- Equisetaceae
Aerial reproductive shoot, which is non-photosynthetic and lacks lateral branches.

Equisetum arvense --- Common Horsetail --- Equisetaceae
Close-up of cone (strobilus) of reproductive shoot.