A large, woolly, perennial herb, with a stout, thick mucilaginous root. Stems stout, usually unbranched, 2 to 6 feet high and densely woolly-pubescent. Leaves alternate, rough-hairy above, densely woolly on the under surface; basal leaves large, 10 to 20 inches long, 4 to 8 inches wide, narrowed into long petioles; upper leaves sessile or clasping the stem by a heart-shaped base, smaller than the basal leaves. Heads of flowers large and showy, 2 to 4 inches broad, yellow, terminal on stout peduncles, the inflorescence consisting of few or several heads. Involucres hemispheric, nearly an inch high, their outer bracts large and almost leaflike in character. Ray flowers numerous, linear, 1 to 11/2 inches long, yellow; the disk flowers dingy yellow or brownish.
Memoir 15 N. Y. State Museum
Elecampane; Horseheal - Inula helenium