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Inula helenium, Linn. Elecampane. Fig. 1959. Tall, thick-stemmed: lvs. unequally dentate-serrate; root- lvs. elliptic-oblong, narrowed into a petiole; st.-lvs. half-clasping, cordate-oblong: outer involucral parts leafy, ovate. Wet, sandy and mountainous regions. Eu., N. Asia. Naturalized in Amer. — The roots are thick and carrot-like. For medicinal purposes, 2-year- old roots should be dug in Aug. lf older, they are likely to be stringy and woody.