Helianthus petiolaris (weed)

Helianthus • Asteraceae (weeds) • Asterales (weeds) • Eudicotyledons • all weeds • pests-diseases-weeds

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Helianthus petiolaris (click on image to enlarge it)
Author(s): Clarence A. Rechenthin, USDA-NRCS PLANTS Database
Source: Wikimedia Commons

Helianthus petiolaris (weed) Nuttall - (prairie sunflower)

This species of sunflower is native to western and central parts of North America, but has spread to eastern areas in North America and to Europe.