Flora of North America species comparison

erect or ascending, (1–)3–15(–20) cm, at least distally glandular- and eglandular-hairy.

erect, usually with 10–20 nodes, (50–)70–120(–150) cm, proximal 1/2 glabrous, distal 1/2 eglandular-hairy with some glandular hairs intermixed.

blade lanceolate to ovate, (4–)6–13 × (2.5–)4–10 mm, 1.3–1.6 times as long as wide, base cuneate, proximal margins coarsely crenate-serrate, distal pinnatifid to subpalmatifid, lobes 3–7, central largest, lateral linear to lanceolate, apex of central lobe obtuse, lateral ± acute, surfaces sparsely glandular-hairy.

blade narrowly ovate-lanceolate, almost linear, or narrowly ovate, (60–)80–120(–150) × 10–30(–35) mm, base cuneate, truncate, or cordate, margins serrate to biserrate, apex acute, surfaces sparsely or densely eglandular-hairy, rarely glabrous.

1–3, terminal and axillary, 20–80 mm, (5–)15–40(–60)-flowered, axis eglandular- and glandular-hairy;

bracts proximalmost often 3-fid, others linear-lanceolate, 3–5(–8) mm.

1–7(–9), terminal and occasionally axillary, 100–200(–300) mm, 150–300-flowered, axis eglandular- and glandular-hairy;

bracts linear to subulate, 2–6 mm.

erect, (0.4–)1–3 mm, shorter than subtending bract, length 1/3–1/2 times calyx, eglandular- and glandular-hairy.

erect, (1–)1.5–3(–5) mm, shorter than subtending bract, densely eglandular-hairy, sometimes also glandular-hairy.

calyx lobes (2–)3–5(–7) mm, apex acute, eglandular- and glandular-hairy;

corolla sky to pale blue, 1.5–3 mm diam.;

stamens 0.2–0.6 mm;

style 0.2–0.6 mm, stigma white.

calyx lobes 2–2.5(–4) mm, apex acute, eglandular-hairy, sometimes glandular-hairy;

corolla blue, campanulate, longer than wide, 5–7 mm diam.;

stamens 5–6 mm;

style (5–)6–8(–10) mm.

compressed in cross section, obcordiform, 2.5–3.5 × 3.5–5 mm, apex emarginate, eglandular-hairy.

± compressed in cross section, ovoid, 2.5–3 × 2.5–3 mm, apex emarginate, glabrous.

8–20(–26), yellowish, ellipsoid, flat, 0.9–1.6 × 0.6–1.3 mm, 0.2 mm thick, smooth to ± rugulose.

2–40, light brown, ellipsoid, flat, 0.7–1.2 × 0.5–0.8 mm, 0.2–0.3 mm thick, smooth.

= 16 (Eurasia).

= 34, 68 (Eurasia).