Classic texts: USDisp 1918.
Helenium flexuosum
Helenium flexuosum Raf.
Engl.: purplehead sneezeweed, naked-flowered sneeze-weed.
Deu.: Purpur-Sonnenbraut.
Bot. syn.: Helenium floridanum Fern., Helenium godfreyi Fern., Helenium nudiflorum Nutt.
Classic texts: USDisp 1918.
Classic texts: Journals: AJP 1885.