Flora of North America species comparison

erect, (7–)10–20(–30) cm, eglandular- and/or glandular-hairy.

prostrate to erect, unbranched, (3–)5–15(–20) cm, viscid-hairy.

blade lanceolate or elliptic, (6–)12–28(–35) × 3–12(–20) mm, base cuneate, margins serrate, teeth 4–7(–12) per side, apex acute, surfaces sparsely glandular-hairy or glabrate.

blade elliptic-ovate, 20–45 × 15–30 mm, 1–3 times as long as wide, base cuneate, margins ± crenate-serrate, apex acute to rounded, abaxial surface with articulate hairs or glabrous, adaxial hirsute, or surfaces sparsely ciliate only.

1–8, terminal, usually reduced and replaced by 2 pseudodichotomous racemes with additional axillary racemes, 80–150 mm, (5–)10–25(–35)-flowered, axis eglandular- and/or glandular-hairy;

bracts lanceolate, 9–12 mm, proximals with margins serrate, distals sometimes entire.

1–4, axillary, 50–150 mm, 3–8-flowered, axis viscid-hairy;

bracts oblong, 3–5 mm.

erect-patent to spreading proximally, deflexed distally, (3–)6–9(–12) mm, shorter than subtending bract, densely glandular- and eglandular-hairy.

suberect, 8–10 mm, longer than subtending bract, viscid-hairy.

calyx lobes (5–)6–8.5(–10) mm, apex acuminate-acute, pairs connate 0.8–1.1 mm, glandular- and eglandular-hairy, rarely sparsely hairy;

corolla mostly intense blue with white center, 4–6 mm diam.;

stamens 2.5 mm;

style (0.7–)1–1.3(–1.7) mm.

calyx lobes 4 mm, apex obtuse, hairy;

corolla bright blue to violet-blue, 8–9 mm diam.;

stamens 7 mm;

style 7–9 mm.

slightly compressed in cross section, 3.5–5 × (4–)5–8 mm, apex emarginate, sinus angle 30–45(–60)°, densely eglandular- and glandular-hairy, rarely eglandular-hairy.

compressed in cross section, obovoid, 9–11 × 7–8 mm, apex emarginate, sparsely hairy.

4–10, yellowish brown, oblong to ovoid, cymbiform, 1.5–2.5 × 0.8–1.5 mm, 0.8 mm thick, cristate, dorsally reticulate-verrucate.

unknown.

= 18, 42 (Asia).

= ca. 48–50 (Russia).