Flora of North America species comparison

ascending to erect, densely branched from woody base, (5–)10–15(–30) cm, eglandular-hairy, sometimes glandular-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 obovate to ovate or spatulate, sometimes suborbiculate proximally, (7–)8–20(–25) × (2–)3–6(–7) mm, mostly shorter to equal to internodes, base cuneate, margins entire or ± crenate or serrate, apex acute, surfaces glabrous or glabrate.

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.

1–10(–20), terminal, rarely with 1–4 axillary, 20–40 mm, (1–)4–10(–18)-flowered, axis glabrate to sparsely eglandular-hairy;

bracts linear or linear-lanceolate or long-ovate, (1–)3.5–9(–15) 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, (2–)5–7(–15) mm, equal to ± longer than subtending bracts, eglandular-hairy.

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

calyx 4(or 5)-lobed, lobes (2.5–)4.5–6(–8) mm, apex obtuse, eglandular-hairy, sometimes also glandular-hairy;

corolla intense blue, sometimes with reddish or white center, rarely white, rotate, (6–)10–14(–15) mm diam.;

stamens 5–7 mm;

style (3–)5–7(–8.5) mm.

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, ovoid, (5–)6–8(–9) × (3–)4–4.5(–5.5) mm, longer than wide, apex attenuate to apiculate and acute, rarely rounded, not emarginate, eglandular-hairy, sometimes mixed with larger glandular hairs.

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

35–62, orange, ellipsoid, flat, 0.9–1.5 × (0.4–)0.9–1.2 mm, 0.2–0.3 mm thick, smooth.

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

= 16.

= 34, 68 (Eurasia).