Flora of North America species comparison

decumbent, ascending, or erect, simple, sometimes few-branched, (8–)15–60 cm, sparsely to densely glandular-puberulent or glandular-pubescent proximally, glandular-puberulent distally.

blade lanceolate-ovate to ovate or oblong, rarely linear-lanceolate in submersed forms, 5–28 × 4–15 mm, margins with (3–)5–10(–12) pairs of sharp teeth, apex acute, rarely obtuse, surfaces sparsely to densely glandular-puberulent.

slender, 10–23 mm, length 0.5–2 times bract, sparsely to densely glandular-puberulent;

bracteoles 2, 3.5–7 mm.

sepals distinct, lanceolate to elliptic or ovate-lanceolate, 3–7 mm;

corolla 9–13 mm, tube yellowish brown, veins blue or lavender, limb white;

style 3–4 mm.

globular, 1–2.5 × 1–2.5 mm.

0.3–0.4 mm.

= 16.