Tussilago farfara L.
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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 - Rhizomatous perennial 0.5–5 dm, the cauline bracts ca 1 cm; lvs long- petioled, cordate to suborbicular, with deep narrow sinus, callous-denticulate and shallowly lobed, 5–20 cm long and wide, glabrous above, persistently white-tomentose beneath; heads at first cylindric, expanding with maturity, the disk to 3 cm wide; invol 8–15 mm; rays very numerous, narrow, not much exceeding the invol and pappus; 2n=60. Native of Eurasia, naturalized in disturbed and waste places in ne. U.S. and adj. Can., w. as far as Minn., and s. to Md., Va., and Ky. Apr.–June.