Flora of North America species comparison

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

decumbent to ascending, (5–)10–30 cm, sparsely subvillous to 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.

blade suborbiculate, 6–20 × 9–20 mm, base subcordate, truncate, or cuneate, margins 5–9-lobed 1/6–1/3 of width of blade, lateral lobes ± narrower, apex acute, surfaces eglandular-hairy, rarely also glandular-hairy or glabrate.

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.

1–10, terminal, (50–)100–300 mm, 5–20-flowered, axis eglandular-hairy, rarely also glandular-hairy or glabrate;

bracts suborbiculate, 6–20 mm, 5- to 9-lobed for 1/6–1/3 of width of leaf blade, lateral lobes ± narrower.

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

patent or recurved, 5–15(–30) mm, equal in flower to ± longer than subtending bract in fruit, eglandular- or glandular-pilose or glabrous.

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.

calyx lobes erect-patent, (3–)4–5 mm, apex obtuse, abaxial surfaces eglandular- or glandular-hairy, rarely glabrous, not ciliate;

corolla white, 6–12 mm diam.;

stamens 1–2 mm;

style 1–2 mm.

± 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.

± round in cross section, ovoid to ellipsoid, 2.5–3.5 × 3.5–4.5 mm, apex ± emarginate, eglandular- or glandular-pilose.

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

1–4, brownish orange, subglobular, urn-shaped (elaiosome inside), (2–)2.5–3.1 × (1.7–)2–2.5(–2.8) mm, 1.1–1.7 mm thick, cristate.

= 16.

= 36, 54 (Eurasia).