Anchusa officinalis L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Taprooted, spreading-hirsute perennial 3–8 dm, often several-stemmed; lower lvs oblanceolate, petiolate, mostly 6–20 cm (petiole included) × 1–1.5 cm, the others gradually reduced, becoming sessile and more lanceolate; bracts lanceolate or lance-triangular; cal 5–7 mm at anthesis, scarcely longer in fr, the lanceolate or narrowly triangular lobes about equaling or a little longer than the tube; cor-tube 6–11 mm, the limb 6–11 mm wide; stamens inserted in the upper part of the tube; nutlets ± rugose and tuberculate, oblique, 2 mm high and 3–4 mm long, the tip directed inward; 2n=16. Native of the Mediterranean region, now found as an occasional weed in much of our range.