Flora of North America species comparison

ascending, unbranched, 5–15 cm, densely glandular-hairy.

erect or prostrate basally, 10–100 cm, glabrous at least proximally, glandular-hairy distally.

blade oblong-elliptic, (5–)10–15(–35) × 4–8 mm, base cuneate, margins entire, apex short-acuminate, surfaces hairy.

petiole 0–5 mm;

blade elliptic to ovate, sometimes ovate-oblong or linear-lanceolate, rarely lanceolate, 20–50(–100) × 5–20(–25) mm, 2.5–4 times as long as wide, base attenuate, upwards amplexicaul, margins subentire or crenate to serrate or ± undulate, apex acute to obtuse, surfaces glabrous.

1, terminal, distalmost leaves often with 1 or 2 axillary flowers, 10–80 mm, (3–)5–15-flowered, axis glandular-hairy;

bracts lanceolate, 3–5 mm.

6–25, axillary, 50–220 mm, 10–15 mm diam., 10–100-flowered, axis sparsely glandular-hairy, rarely glabrous;

pedicels 2–6 per cm;

bracts linear to lanceolate, 3–6 mm, apex acute.

erect, 5–8 mm, equal to ± longer than subtending bract, densely glandular-hairy.

patent, 3–5 mm, equal to subtending bract, sparsely glandular-hairy.

calyx 4(or 5)-lobed, lobes (1–)2–3 mm, apex obtuse, glandular-hairy;

corolla pale blue to purple, rotate, 8–10 mm diam.;

stamens 4–5 mm;

style 7 mm.

calyx lobes 1.5–2(–3) mm, apex acute, sparsely glandular-hairy, rarely glabrous;

corolla pale blue or pale lilac, rarely white, 2.5–5 mm diam.;

stamens 2 mm;

style 0.9–2 mm.

compressed in cross section, broadly oblong, 5–6 × 3.5 mm, longer than wide, apex emarginate, glandular-hairy.

slightly compressed in cross section, obcordiform to globular, 2–3 × 2–3 mm, apex rounded or ± emarginate, sparsely glandular-hairy.

number unknown, brown, ovoid, flat, 1–1.2 × 0.7–1.1 mm, thickness and texture unknown.

30–40, ochre, broadly ellipsoid, ± flat, convex on both sides, 0.5–0.6 × 0.4–0.5 mm, thickness and texture unknown.

= 18.

= 54 (Asia).