Hieracium flagellare Willd.

• Authority

  Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

• Family

  Asteraceae

• Scientific Name

  Hieracium flagellare Willd.

• Description

  Species Description - Vigorously stoloniferous and with a slender, elongate or short and praemorse rhizome, 1.5–4 dm tall, somewhat glaucous; stem nearly naked, pale, finely stellate and with scattered spreading bristles, generally also with some shorter, gland-tipped setae, especially upwards; basal lvs oblanceolate, 3–13 × 0.5–2.5 cm, green and sparsely setose or virtually glabrous above, pale, thinly stellate, and with scattered long setae (especially along the midrib) beneath; heads 2–6, on ± elongate peduncles in an open infl; invol 8–12 mm, inconspicuously stellate, copiously beset with rather short, blackish, gland-tipped setae and often also with some longer glandless ones; 2n=26, 45, 54. A weed in fields and along roadsides, etc.; native of Europe, now sparingly intr. from N.Y. to Que. May, June.

• Common Names

  whiplash-hawkweed