Crepis vesicaria 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 - Annual, biennial, or occasionally short-lived perennial; stem 1–8 dm, purple near the base, ± hispid or tomentulose or both; lvs finely short-hairy on both sides, the basal to 20 × 4 cm, narrowly oblanceolate to spatulate or obovate, dentate to runcinate-pinnatifid or pectinately parted; cauline lvs progressively reduced, auriculate-clasping; heads several to ± numerous; invol 8–12 mm, its inner bracts 9–13, tomentose and often glandular, sometimes with some short black setae distally, becoming carinate-thickened in fr; outer bracts up to ca half as long as the inner; fls numerous; achenes pale brown, 4–5.9 mm, 10-ribbed, gradually attenuate into a slender beak equaling or a little longer than the body; 2n=8, 16. Fields and waste places; native of the Medit. region and w. Europe, sparingly intr. into e. U.S. s. to N.C. May–July. Amer. plants are ssp. taraxacifolia (Thuill.) Thell.