Flora of North America species comparison

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

erect or prostrate basally, (20–)30–100(–170) cm, usually thick-fleshy, glabrous.

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.

petiole 0–2(–8) mm (basal lateral branches usually distinctly petiolate to 8 mm) proximally, 0 mm distally;

blade (of proximal leaves) ovate, elliptic, or oblong, (15–)30–80(–145) × (7–)10–30(–45) mm, 1.5–3 times as long as wide, base obtuse proximally to cordate-amplexicaul in middle and ± cuneate distally, margins ± serrulate or denticulate, apex acute, surfaces glabrous, rarely glandular-hairy.

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

bracts oblanceolate, 4–5 mm.

6–25, axillary, 50–100(–150) mm, 5–10 mm diam., (20–)30–40(–60)-flowered, axis glabrous, rarely glandular-hairy;

bracts linear to lanceolate, 2–5 mm, apex acute.

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

suberect or arcuate-erect to subpatent, curved upwards in fruit, 3–7(–10) mm, longer than subtending bracts, glabrous or 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 2–3 mm, apex acute, glabrous, rarely hairy;

corolla lavender to pale blue, rarely pale lilac, (4–)6–8 mm diam.;

stamens 3–3.5 mm;

style 1.5–2.5 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.

slightly compressed in cross section, globular, (2.5–)3–3.5(–4) × 2.5–3.2(–4) mm, apex rounded or ± emarginate, glabrous or sparsely short glandular-hairy.

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

40–77, yellow-brown, ellipsoid to subglobular, planoconvex, (0.3–)0.5–0.7 × 0.3–0.5 mm, 0.2–0.3 mm thick, smooth.

= 18.

= 36.