Flora of North America species comparison

ascending, often dark bluish distally, sparsely branched at base, 5–15(–25) cm, eglandular-hairy.

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

blade ovate or oblong-elliptic, 7–30 × 4–20 mm, base cuneate, margins indistinctly dentate or entire, apex short-acuminate, abaxial surface glabrate, adaxial ± hairy.

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

1, terminal, 5–20 mm, to 30 mm in fruit, (1–)3–20-flowered, axis eglandular-hairy;

bracts oblanceolate, 4–5 mm.

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

bracts lanceolate, 2–5 mm.

ascending to erect, 1.5–2(–4) mm, shorter than subtending bract, eglandular-hairy.

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

calyx lobes 3–4 mm, ciliate, apex obtuse or acuminate, eglandular-hairy;

corolla sky blue or blue-violet, sometimes white, rotate, 2.5–5.5 mm diam.;

stamens 2–2.3 mm;

style 0.5–1.5(–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, obovoid or oblong-obovoid, 4.5–7.5 × 3.5–5.5 mm, ca. as long as wide, apex shallowly emarginate, eglandular-hairy or glabrate.

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

9–53, brown to yellow, ellipsoid-oblong, flat, 0.7–1.2 × 0.4–1 mm, 0.1 mm thick, smooth.

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

= 18.

= 18 (Japan, Russia).