Helianthus divaricatus, commonly known as the rough sunflower, woodland sunflower, or rough woodland sunflower,Dickinson, T.; Metsger, D.; Bull, J.; & Dickinson, R. (2004). ROM Field Guide to Wildflowers of Ontario. Toronto:Royal Ontario Museum, p. 170. is a North American species perennial herb in the family Asteraceae. It is native to central and eastern North America, from Ontario and Quebec in the north, south to Florida and Louisiana and west to Oklahoma and Iowa.Biota of North America Program 2014 county distribution map
Helanthus divaricatus commonly occurs in dry, relatively open sites. The showy yellow flowers emerge in summer through early fall.
The woodland sunflower is similar to Helianthus hirsutus, but its stem is rough. It grows up to tall with short stalked, lanceolate to oval leaves, wide with toothed margins. Its flowers have 8 to 15 rays, each long, surrounding an orange or yellowish brown central disk. The plant attracts birds and butterflies. The Latin specific epithet divaricatus means spreading in a straggling manner.
References
External links
Distribution Map from Flora of North America Missouri Plants