Flora of North America species comparison

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

ascending, rarely erect, (7–)10–30(–50) cm, densely eglandular-hairy, hairs along stem in 2 prominent lines.

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

blade narrowly ovate to ovate-orbiculate, (10–)12–30(–42) × (6–)10–22(–30) mm, 1–2 times as long as wide, base truncate to ± cordate, margins crenate to deeply incised, apex obtuse, surfaces variably hairy.

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

bracts lanceolate, 3–7(–11) mm.

1–4, axillary, 40–100(–200) mm, 15–40(–60)-flowered, axis eglandular-hairy, sometimes also glandular-hairy;

bracts linear-elliptic, 3–7 mm.

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

suberect, (3–)5–8(–10) mm, equal to or shorter than subtending bract, eglandular- and glandular-hairy.

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.

calyx 4-lobed, lobes 2–8 mm, apex acute, eglandular- and, sometimes, glandular-hairy;

corolla blue obscure darker nerves and sometimes whitish margin, (6–)10–14(–17) mm diam.;

stamens 4.5–6.5 mm;

style (2.5–)4–5 mm.

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

strongly compressed in cross section, obcordiform to obdeltoid, (2–)3.5–4(–5) × (3.5–)4–5(–5.5) mm, apex ± emarginate, eglandular-hairy.

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

(2–)12–20(–28), yellow, ellipsoid, flat, 1.1–1.7 × 0.6–1.5 mm, 0.2–0.4 mm thick, smooth to subrugose.

= 18, 72.

= 16, 32 (Eurasia).