Flora of North America species comparison

decumbent to ascending proximally, creeping distally, 10–60 cm, glabrous.

petiole 2–4(–8) mm;

blade broadly oblong, ovate, or subelliptic, widest near or distal to middle, (10–)15–35(–65) × (6–)8–20(–33) mm, 1.5–2 times as long as wide, base rounded-truncate to cuneate, margins denticulate, subserrulate, or subentire, rarely crenulate, apex obtuse-rounded, shining, surfaces glabrous.

2–6(–12), axillary, 30–50 mm, (5–)10–15(–22)-flowered, axis glabrous;

bracts lanceolate, 3–6 mm.

subpatent, arcuate-erect, or suberect, (2.5–)3–7(–10) mm, equal to subtending bract, glabrous.

calyx lobes 2–2.5 mm, apex acute, glabrous;

corolla deep or bright, rarely pale, blue with white center, 5–6 mm diam.;

stamens 1.4–2.8 mm;

style (1.3–)1.5–3(–3.5) mm.

slightly compressed in cross section, broadly ellipsoid or globular, 2.5–4(–5.5) × 3–4(–4.5) mm, apex not or ± emarginate, glabrous.

38–70(–110), brown, broadly ellipsoid, flat, 0.4–0.6 × 0.3–0.5 mm, 0.2–0.3 mm thick, smooth.

= 18, 36.