HYPP-A Unité de Malherbologie & Agronomie
Weed Science & Agronomy

Bayer Code : equte

Scientific name: Equisetum telmateia Ehrhart

Synonym(s) of Sc. name: Equisetum maximum auct., Equisetum majus Gars.

Classification: Equisetaceae, Equisetaceae

Common name: great horsetail

Synonym(s) of Common name:

Name per country: DE : Riesen-Schachtelhalm ; ES : rabo de mula ; FR : prêle géante ; IT : equiseto massimo ; PT : cavalinha. ; EN : great horsetail ;

Biological type: Perennial with rhizomes


- Plant propagates mostly vegetatively (rhizomes...); establishment from seedling is rare.

Adult plant snapshotAdult plant snapshot Adult plant:

- Height: 20-120 cm, according to the nature of stems (sterile or fertile). Underground stem stout and extensive (rhizome ) without cavity persisting during the summer.

- Stems sterile (up to 120 cm; 12 mm in diameter), ivory-white, finely striated, smooth, with a large central cavity; short sheaths ; numerous whorls of green branches, simple, long 8-angled.

- Stem fertile (up to 40 cm, 15 mm in diameter), light-yellow or brown, simple, smooth; brown campanulate sheaths, with 20-30 linear teeth.

- Fruiting: big spike (4-8 cm x 1-2 cm), oblong, with the sporangia.

- Rare in crops.

- Risk of confusion with Equisetum arvense L.

- Biological type: Perennial with rhizomes.

Mistake with: Equisetum arvense

Ecological profile (click on flags): Spain   Rare     France  Rare     Italy  Present     Portugal  Present    

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