Lappula squarrosa (Retz.) Dumort.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Stems 2–8 dm, tending to be appressed- hairy, mostly freely-branched above; lvs linear to linear-oblong or linear-oblanceolate, 2–5 cm, usually ascending, sessile, rough-hairy; racemes numerous, eventually 5–10 cm; mature pedicels erect or ascending, 1–2 mm; bracts linear or lanceolate, 3–10 mm; cor blue, 2–3(–4) mm wide; nutlets 3–4 mm, the outer face lanceolate, roughened, surrounded by 2(3) rows of prickles, those of the inner row usually the longer; 2n=48. Native of Eurasia, established as a weed in waste places in much of the U.S. and s. Can., in our range more common northward. May–Sept. (L. echinata; L. lappula)