Flora of North America species comparison

erect or prostrate basally, 10–100 cm, glabrous at least proximally, glandular-hairy distally.

creeping to decumbent, 5–20(–40) cm, eglandular-hairy.

petiole 0–5 mm;

blade elliptic to ovate, sometimes ovate-oblong or linear-lanceolate, rarely lanceolate, 20–50(–100) × 5–20(–25) mm, 2.5–4 times as long as wide, base attenuate, upwards amplexicaul, margins subentire or crenate to serrate or ± undulate, apex acute to obtuse, surfaces glabrous.

blade suborbiculate to ovate, rarely oblong-ovate, (3–)6–11(–14) × (3–)4–9(–10) mm, base truncate, margins serrate to dentate, teeth 2–4 per side, apices usually rounded, apex acute to obtuse, abaxial surface densely hairy, adaxial sparsely hairy to glabrate.

6–25, axillary, 50–220 mm, 10–15 mm diam., 10–100-flowered, axis sparsely glandular-hairy, rarely glabrous;

pedicels 2–6 per cm;

bracts linear to lanceolate, 3–6 mm, apex acute.

1–4, terminal, 50–200(–400) mm, 5–20-flowered, axis sparsely to densely hairy or glabrate;

bracts suborbiculate to ovate, (3–)6–11(–14) mm.

patent, 3–5 mm, equal to subtending bract, sparsely glandular-hairy.

usually semicircularly recurved, (3–)6–13(–15) mm, 0.5–1.5 times subtending bract, densely eglandular-hairy.

calyx lobes 1.5–2(–3) mm, apex acute, sparsely glandular-hairy, rarely glabrous;

corolla pale blue or pale lilac, rarely white, 2.5–5 mm diam.;

stamens 2 mm;

style 0.9–2 mm.

calyx lobes broadly ovate, (3–)4–6(–7) mm, 2.6–3.8 mm wide, apex acute, eglandular-hairy, rarely glandular-hairy;

corolla intense dark to bright blue, rarely pale lilac or white, with darker nerves, abaxial 1/2 often brighter to whitish, (3–)4–7(–8) mm diam.;

stamens 0.5 mm;

style (0.5–)1–1.6(–1.8) mm.

slightly compressed in cross section, obcordiform to globular, 2–3 × 2–3 mm, apex rounded or ± emarginate, sparsely glandular-hairy.

± round in cross section, obcordiform, (2.5–)3–4(–4.5) × (3.5–)4–6(–6.3) mm, apex emarginate, sinus angle 20–60(–80)°, densely eglandular-hairy, sometimes also glandular-puberulent, rarely glabrous.

30–40, ochre, broadly ellipsoid, ± flat, convex on both sides, 0.5–0.6 × 0.4–0.5 mm, thickness and texture unknown.

(7–)16–24(–30), pale yellow, ellipsoid to ovoid, deeply cymbiform, 0.9–1.6 × (0.5–)0.8–1.3 mm, 0.4–0.8 mm thick, rugose-cristate.

= 54 (Asia).

= 14 (Eurasia).