Lithospermum arvense L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Strigose annual 1–8 dm, often branched at the base; lvs mostly linear to narrowly oblanceolate, 3–8(–15) mm wide, acute or obtuse, 1-nerved; fls solitary in the crowded upper axils, becoming remote, whitish or bluish-white, 5–8 mm, 2–4 mm wide; cal-lobes nearly as long as the cor; nutlets ovoid, pale dull brown, 3 mm, deeply wrinkled and pitted; 2n=28. Native of Eurasia, intr. as a weed of waste places over most of the U.S. Apr.–July. (Buglossoides a.)