Helenium amarum (Raf.) H.Rock
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Asteraceae
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Scientific Name
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Description
Species Description - Taprooted, glabrous or atomiferous-glandular annual 2–5 dm; lvs very numerous, linear or linear-filiform, 1.5–8 cm, seldom over 2 mm wide; heads on short, naked peduncles extending above the leafy part of the plant; rays 5–10, pistillate, 5–12 mm; disk subglobose, yellow, 6–12 mm wide; pappus-scales commonly 6–8, ca 1.5 mm, the awn-tip about equaling the hyaline body; 2n=30. Prairies, open woods, fields, and waste places, especially in sandy soil; mainly Texan and Ozarkian, n. to Mo., but irregularly intr. e. to Conn., Md., Va., Ga., and Fla., and in Mex. and W.I. June–Oct. (H. tenuifolium) We have only the var. amarum, with yellow disk and entire lvs.
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Common Names
narrow-leaved sneezeweed