Hieracium pilosella L.

  • Authority

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

  • Family


  • Scientific Name

    Hieracium pilosella L.

  • Description

    Species Description - Abundantly stoloniferous, and with a long, slender rhizome; stem 3–25(–40) cm, lfless or with a single generally much reduced lf, viscid-puberulent or subtomentose, sparsely or moderately spreading-hispid with gland-tipped, usually blackish hairs, often long-setose as well; basal lvs oblanceolate or a little broader, 2–13 × 0.6–2 cm, tawny-tomentose with stellate hairs beneath, at least when young, and with some long glandless setae as well, green and glabrous above except for the long setae; lvs of the stolons similar but smaller; heads solitary, or rarely 2–3 and long- pedunculate on some individuals; invol 7–11 mm, stellate, short-hispid with black, sometimes gland- tipped hairs, and occasionally long-setose as well; achenes 1.5–2 mm, truncate; 2n=18, 36, 45, 54, 63. A weed in pastures and fields; native of Europe, now widespread in our range. May–Sept.

  • Common Names

    mouse-ear hawkweed