Veronica persica Poir.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Somewhat villous-hirsute annual, the stems 1–4 dm, simple or branched especially below, loosely ascending and often rooting below; main lvs opposite, short-petiolate, the blade broadly elliptic or ovate, crenate-serrate, 1–2 cm, 1–1.5 times as long as wide; floriferous part of the stem elongate, with alternate bracts like the lvs, each with a single long-pedicellate axillary fl, the pedicel becoming 1.5–4 cm; cal-lobes lance-ovate, accrescent to 6–8 mm, becoming strongly 3-nerved; cor blue, (5–)8–11 mm wide; fr 5–9 mm wide, 3–5 mm high, divergently lobed, reticulately veined; style 1.8–3 mm; seeds 5–10 per locule, 1.2–1.8 mm, transversely rugose; 2n=28. Native of sw. Asia, intr. in gardens, lawns, roadsides and waste places throughout much of N. Amer. Apr.–Aug. (V. tournefortii)