Flora of North America species comparison

creeping to decumbent, 5–25 cm, hairy.

erect to ascending, unbranched, (5–)10–20(–25) cm, eglandular-hairy.

blade elliptic-ovate to oblong, (6–)8–16(–19) × (3–)4–10(–13) mm, base truncate, margins serrate, teeth 4–6(–8) per side, apex obtuse to acute, abaxial surface ± more densely hairy than adaxial.

blade ovate, 15–30 × 10–20 mm, base rounded, margins dentate or serrate, apex subacute to subobtuse, surfaces eglandular-hairy.

1–5, terminal, 50–250 mm, 5–15-flowered, axis eglandular-hairy, sometimes glandular-hairy;

bracts elliptic-ovate to oblong, (6–)9–16(–19) mm.

1, terminal, 10–60 mm, to 100 mm in fruit, 5–15-flowered, axis hairy;

bracts lanceolate, 2–5 mm.

deflexed, (5–)6–10(–15) mm, ± shorter than subtending bracts, densely eglandular- and, sometimes, glandular-hairy distally.

erect, 2–11 mm, equal to longer than subtending bract, crisp-hairy.

calyx lobes linear-lanceolate, (5–)6–7 mm, 2.2–2.6 mm wide, apex rounded, sparsely eglandular- or glandular-hairy;

corolla white or pale pinkish or pale blue, 4–5(–6) mm diam.;

stamens 0.5–1 mm;

style (0.6–)0.9–1.1(–1.2) mm.

calyx lobes 4–5 mm, eglandular-ciliate, apex acuminate, glabrous or sparsely hairy;

corolla pale blue or violet, rotate, 8–10 mm diam.;

stamens 7 mm;

style 3–6 mm.

± compressed in cross section, ± subglobular, 3.5–4.5(–4.7) × 4.5–6(–6.3) mm, apex emarginate, sparsely glandular-hairy.

compressed in cross section, oblong, 5–6(–8) × 3–4.5 mm, longer than wide, apex ± emarginate, glabrous proximally, hairy distally.

6–14, yellow to ochre, globular, cymbiform, 1.3–2.1 × 1–1.6 mm, 0.6–1.1 mm thick, strongly rugose (transversely ribbed).

number unknown, brown, ovoid, flat, 1–1.5 × 0.7–1.2 mm, thickness and texture unknown.

= 28 (Europe).

= 18 (Japan, Russia).