Flora of North America species comparison

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

erect to ascending, 1–30(–40) cm, glandular- or eglandular-hairy.

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

in 3–6 pairs per stem;

blade oblong to broadly ovate, (2–)5–14(–35) × (2–)3–10(–18) mm, 2.5 times as long as wide, base truncate, margins crenate-serrate, apex obtuse to rounded, surfaces sparsely eglandular-hairy, rarely also glandular-hairy.

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

bracts lanceolate, 3–7(–11) mm.

1(–3), terminal, 20–150 mm, (5–)15–40(–60)-flowered, axis densely eglandular- and glandular-hairy;

bracts linear-oblong, (3.5–)4–6(–10) mm.

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

erect, 0–4 mm, shorter than subtending bract, densely 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 lobes (2–)3.5–5(–6) mm, 0.8–2 mm wide, apex acute, glandular-hairy;

corolla sky blue to intense blue, 2–4 mm diam.;

stamens 0.3–0.5 mm;

style (0.2–)0.4–0.6(–1) mm.

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

compressed in cross section, obcordiform, 2–4 × 2.5–5 mm, apex markedly emarginate, glandular-ciliate, otherwise glabrous.

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

10–30, yellowish, ovoid, flat, 0.7–1.7 × 0.4–1 mm, 0.2–0.4 mm thick, rugose.

= 18, 72.

= 16.