Collinsia parviflora Douglas
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Erect, 1–4 dm, often branched from the base; cauline lvs linear to narrowly oblong, 1–3 cm, entire or nearly so, narrowed below to a petiolar base; lowest fls solitary, upper in whorls of 2–6 on slender pedicels 5–15 mm; cal-lobes lance-linear, acuminate, 2.5–4 mm; cor barely surpassing the cal-lobes; upper lip usually white or whitish, the lower blue; cor-lobes oblong-spatulate, not retuse; filaments all glabrous; seeds 2; 2n=14. Sterile rocky soil; widespread in the w. cordillera, e. to Man. and w. Neb.; n. Mich.; also s. Ont., Vt., and N.S., where probably only intr. May–July.
Cordilleran blue-eyed Mary