Similar to no. 8 [Hieracium lachenalii C. C. Gmel.], and passing into it; basal lvs with well defined blade, broadly rounded or subtruncate to cordate at base; stem commonly naked or with only 1 or 2 lvs; 2n=27, 36. Native of Europe, sparingly intr. along roadsides and in other waste places from N.S. and Que. to N.Y. and N.J., and reportedly w. to Mich. June, July.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.