Flora of North America species comparison

decumbent to ascending, 5–40(–50) cm, eglandular-hairy.

erect, unbranched or sparsely branched at base, (5–)10–15(–30) cm, finely glandular-hairy.

blade suborbiculate, (3–)5-lobed, central lobe usually overtopping lateral ones, (5–)7–15(–20) × 8–16(–25) mm, base truncate, margins (3–)5-lobed, apex acute, surfaces sparsely eglandular-hairy.

blade elliptic-ovate, (5–)10–25 × 5–10 mm, base cuneate, margins entire or subentire, apex short-acuminate, surfaces glabrous or glabrate.

1–10, terminal, 50–400(–500) mm, 5–20-flowered, axis eglandular-hairy;

bracts suborbiculate, (3–)5-lobed, central lobe usually overtopping lateral ones, (5–)7–15(–20) mm.

1, terminal, (15–)40–80(–130) mm, (4–)8–30(–40)-flowered, axis finely glandular-hairy;

bracts lanceolate, 3–7(–11) mm.

patent or deflexed, (5–)9–15(–20) mm, equal to or ± shorter than subtending bract, length 2–3 times calyx, eglandular-hairy (in single line adaxially).

erect, 3–9 mm, equal to or ± longer than subtending bract, finely glandular-hairy.

calyx lobes 5–6(–7) mm, apex acute, abaxial surface usually glabrous, ciliate with 25–35 hairs per side;

corolla bright blue with bright white center, 5–7(–9) mm diam.;

stamens sky blue, 0.7–1.2 mm;

style (0.6–)0.7–0.9(–1.1) mm.

calyx lobes 2–3 mm, apex acute to obtuse, finely glandular-hairy;

corolla deep blue-violet, rarely white, rotate, (8–)10–13 mm diam.;

stamens 4–8 mm;

style (5–)6–9(–10) mm, conspicuously exerted.

± round in cross section, ovoid, 3–4 × 4.5–6 mm, apex ± emarginate, glabrate.

compressed in cross section, oblong-obovoid, 4–6 × 3.5–5.5 mm, ca. as long as wide, apex emarginate, finely glandular-hairy.

1–4, bright yellow, ellipsoid to subglobular, urn-shaped, 2.3–3.3 × 2–3 mm, 1–2.2 mm thick, weakly cristate or rugose, ± smooth.

28–32, straw colored or dark brown, ovoid, flat, 0.6 × 0.4 mm, 0.1 mm thick, rough.

= 54 (Eurasia).

= 18, 72.