Classic texts: King's 1898.
Helenium amarum
Helenium amarum (Raf.) H. Rock.
Engl.: yellowdicks.
Deu.: Feinblättrige Sonnenbraut.
Bot. syn.: Helenium tenuifolium Nutt.
Helenium. False Sunflower, Sneezewort, Sneezeweed. Helenium autumnale.
Classic texts: USDisp 1918.