Lythrum hyssopifolia (Grass Poly) is a species of annual herb in the family Lythraceae. They have a self-supporting growth form. They are associated with freshwater habitat. They are native to Rio Grande Do Sul, Mata Atlântica, and Pampa. They have simple, broad leaves and loculicidal capsule fruit. Individuals can grow to 0.16 m.
EOL has data for 23 attributes, including: