Flora of North America species comparison

erect to ascending, 1–30(–40) cm, glandular- or eglandular-hairy.

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

in 3–6 pairs per stem;

blade oblong to broadly ovate, (2–)5–14(–35) × (2–)3–10(–18) mm, 2.5 times as long as wide, base truncate, margins crenate-serrate, apex obtuse to rounded, surfaces sparsely eglandular-hairy, rarely also glandular-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.

1(–3), terminal, 20–150 mm, (5–)15–40(–60)-flowered, axis densely eglandular- and glandular-hairy;

bracts linear-oblong, (3.5–)4–6(–10) mm.

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.

erect, 0–4 mm, shorter than subtending bract, densely eglandular- and glandular-hairy.

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

calyx lobes (2–)3.5–5(–6) mm, 0.8–2 mm wide, apex acute, glandular-hairy;

corolla sky blue to intense blue, 2–4 mm diam.;

stamens 0.3–0.5 mm;

style (0.2–)0.4–0.6(–1) mm.

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.

compressed in cross section, obcordiform, 2–4 × 2.5–5 mm, apex markedly emarginate, glandular-ciliate, otherwise glabrous.

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

10–30, yellowish, ovoid, flat, 0.7–1.7 × 0.4–1 mm, 0.2–0.4 mm thick, rugose.

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

= 16.

= 54 (Asia).