Noun: rough horsetail
- Evergreen erect horsetail with rough-edged stems; formerly used for scouring utensils
"Pioneers used rough horsetail to clean their pots";
- scouring rush, Equisetum hyemale, Equisetum hyemale robustum, Equisetum robustum
Derived forms: rough horsetails
Type of: horsetail
Encyclopedia: Rough horsetail