Flora of North America species comparison

erect, (1–)2–10(–18) cm, eglandular-hairy.

ascending to erect, densely branched from woody base, (5–)10–15(–30) cm, eglandular-hairy, sometimes glandular-hairy.

blade ovate to lanceolate-ovate, (3–)4–12(–20) × (1–)2–6(–12) mm, base cuneate, margins remotely serrate, rarely dentate, apex acute, surfaces glabrate.

blade obovate to ovate or spatulate, sometimes suborbiculate proximally, (7–)8–20(–25) × (2–)3–6(–7) mm, mostly shorter to equal to internodes, base cuneate, margins entire or ± crenate or serrate, apex acute, surfaces glabrous or glabrate.

1–8, terminal, 20–80 mm, 5–15(–30)-flowered, axis eglandular- and glandular-hairy;

bracts lanceolate, 6–9 mm, margins entire, apex acute.

1–10(–20), terminal, rarely with 1–4 axillary, 20–40 mm, (1–)4–10(–18)-flowered, axis glabrate to sparsely eglandular-hairy;

bracts linear or linear-lanceolate or long-ovate, (1–)3.5–9(–15) mm.

straight or scarcely deflexed, erect-spreading to horizontally spreading in fruit, (2–)3–8(–11) mm, shorter than subtending bract, eglandular-hairy, sometimes glandular-hairy, rarely glabrous.

erect, (2–)5–7(–15) mm, equal to ± longer than subtending bracts, eglandular-hairy.

calyx lobes (3–)4–7(–9) mm, margins entire, apex acuminate-acute, pairs connate 0.5–1.5 mm, puberulent or glabrate;

corolla pale to clear blue, 2–4 mm diam.;

stamens 1–2 mm;

style 0.4–0.8(–2) mm.

calyx 4(or 5)-lobed, lobes (2.5–)4.5–6(–8) mm, apex obtuse, eglandular-hairy, sometimes also glandular-hairy;

corolla intense blue, sometimes with reddish or white center, rarely white, rotate, (6–)10–14(–15) mm diam.;

stamens 5–7 mm;

style (3–)5–7(–8.5) mm.

slightly compressed in cross section, obcordiform, (2.4–)2.8–4(–4.5) × (3–)3.5–5(–6) mm, apex emarginate, eglandular- and/or glandular-hairy, rarely glabrous.

± compressed in cross section, ovoid, (5–)6–8(–9) × (3–)4–4.5(–5.5) mm, longer than wide, apex attenuate to apiculate and acute, rarely rounded, not emarginate, eglandular-hairy, sometimes mixed with larger glandular hairs.

(2–)4–6(–10), bright yellow, oblong, cymbiform, (1.4–)1.7–2(–2.2) × (0.7–)1–1.3 mm, 0.7 mm thick, smooth.

35–62, orange, ellipsoid, flat, 0.9–1.5 × (0.4–)0.9–1.2 mm, 0.2–0.3 mm thick, smooth.

= 28 (Asia).

= 16.