common blue violet (wild violet) Vioila sororia Willd.
Family: Violaceae (violet)
Life cycle: Perennial, reproducing by seed and short rhizomes
Native status: Native
Habitat: lawns, wooded areas
General description: Leaves emerge from a basal crown, up to 4.5 in long and 3.5 in wide with petioles. Leaf shape variable, ranging from heart to egg shaped; rounded teeth on margins, hairless. Flowers are blue to purple with 5 showy petals. Rhizomes are short, think and branched.
Key ID traits: Heart-shaped leaves developing from crown, typically found in dense colonies due to spreading by short rhizomes.
Similar species: Several similar violet species are found in Iowa, but common blue violet is best adapted to lawns. Field pansy is a winter annual with a similar appearance occasionally found in no-till fields.
Bob Hartzler Professor of Agronomy
Dr. Bob Hartzler is a professor of agronomy and an extension weed specialist. He conducts research on weed biology and how it impacts the efficacy of weed management programs in corn and soybean. Dr. Hartzler also teaches undergraduate classes in weed science and weed identificatio...