| Helianthus divaricatus | |
|---|---|
| |
| Conservation status | |
 Secure (NatureServe) | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Helianthus |
| Species: | H. divaricatus |
| Binomial name | |
| Helianthus divaricatus L. | |
| Synonyms | |
|
Helianthus divaricatus var. angustifolius Kuntze | |
Helianthus divaricatus, commonly known as the rough sunflower, woodland sunflower, or rough woodland sunflower, 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.
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 is up to 1.5 m tall with short stalked, lanceolate to oval leaves, 1–8 cm wide with toothed margins. Its flowers have 8 to 15 rays, each 1.5 to 3 cm (0.6-1.2 inches) 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
- "Helianthus divaricatus". NatureServe Explorer. NatureServe. Archived from the original on April 15, 2013. Retrieved 2008-08-30.
- The Plant List, Helianthus divaricatus L.
- BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
- NRCS. "Helianthus divaricatus". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 19 January 2016.
- ^ Dickinson, T.; Metsger, D.; Bull, J.; & Dickinson, R. (2004). ROM Field Guide to Wildflowers of Ontario. Toronto:Royal Ontario Museum, p. 170.
- Biota of North America Program 2014 county distribution map
- Schilling, Edward E. (2006). "Helianthus divaricatus". Flora of North America. Vol. 21. Oxford: Oxford University Press. p. 157.
- "Helianthus divaricatus - Plant Finder". www.missouribotanicalgarden.org. Retrieved 2022-01-16.
External links
Media related to Helianthus divaricatus at Wikimedia Commons
Data related to Helianthus divaricatus at Wikispecies- Distribution Map from Flora of North America
- Missouri Plants
| Taxon identifiers | |
|---|---|
| Helianthus divaricatus |
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