Epilobium tetragonum (Square Stemmed Willowherb) is a species of perennial herb in the family Onagraceae. They have a self-supporting growth form. They have simple, broad leaves. Flowers are visited by Brown-banded carder bee, Sphaerophoria, Platycheirus peltatus, and Baccha elongata. Individuals can grow to 0.48 m.
EOL has data for 17 attributes, including: