Flora of North America species comparison

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

ascending, usually with 4–10 nodes, 5–45(–60) cm, proximally eglandular- or glandular-hairy, sometimes glabrous, distally eglandular- and, usually, glandular-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 ovate-oblong to narrowly oblong-lanceolate, (30–)40–70(–80) × 5–20 mm, base long-cuneate, margins shallowly crenate to shallowly serrate to subentire, apex obtuse to rounded, surfaces densely glandular- or eglandular-hairy, rarely glabrate.

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(–7), terminal, sometimes with lateral ones, (50–)70–130(–170) mm, (50–)100–300-flowered, axis eglandular- and glandular-hairy;

bracts oblong to lanceolate, 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 to patent, 0.5–1(–2) mm, shorter than subtending bract, eglandular- and glandular-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 2–3 mm, ciliate, apex obtuse, glandular-hairy, rarely eglandular-hairy;

corolla blue, campanulate, longer than wide, 5–6 mm diam., lobes 3–4.5 × 1.5–2 mm;

stamens 5 mm;

style 8 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, broadly ovoid, 2–3 × 2–3 mm, apex obtuse, densely glandular-puberulent.

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.

3–40, light brown, ellipsoid, flat, 0.6–1.2 × 0.5–0.8 mm, 0.2–0.4 mm thick, smooth.

= 18, 42 (Asia).

= 34, 68 (Europe).