Flora of North America species comparison

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

decumbent to ascending, 5–40(–50) cm, eglandular-hairy.

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.

blade suborbiculate, (3–)5-lobed, central lobe usually overtopping lateral ones, (5–)7–15(–20) × 8–16(–25) mm, base truncate, margins (3–)5-lobed, apex acute, surfaces sparsely eglandular-hairy.

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.

1–10, terminal, 50–400(–500) mm, 5–20-flowered, axis eglandular-hairy;

bracts suborbiculate, (3–)5-lobed, central lobe usually overtopping lateral ones, (5–)7–15(–20) mm.

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

patent or deflexed, (5–)9–15(–20) mm, equal to or ± shorter than subtending bract, length 2–3 times calyx, eglandular-hairy (in single line adaxially).

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 5–6(–7) mm, apex acute, abaxial surface usually glabrous, ciliate with 25–35 hairs per side;

corolla bright blue with bright white center, 5–7(–9) mm diam.;

stamens sky blue, 0.7–1.2 mm;

style (0.6–)0.7–0.9(–1.1) mm.

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

± round in cross section, ovoid, 3–4 × 4.5–6 mm, apex ± emarginate, glabrate.

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

1–4, bright yellow, ellipsoid to subglobular, urn-shaped, 2.3–3.3 × 2–3 mm, 1–2.2 mm thick, weakly cristate or rugose, ± smooth.

= 16.

= 54 (Eurasia).