Flora of North America species comparison

spreading, sometimes rooting at nodes;

branchlets green, sometimes tinged red, not thorn-tipped, usually round, sometimes angled, in cross section, flexible, puberulent.

prostrate, spreading, ascending, or erect, sometimes rooting at proximal nodes;

branchlets green to brown or reddish brown, flexible to rigid, strigillose or tomentulose.

petiole 3–11 mm;

blade flat, elliptic to widely ovate, 12–45 × 6–20 mm, base obtuse to rounded, margins serrulate to denticulate, not revolute, usually not wavy, sometimes wavy, teeth 27–42, apex ± obtuse to rounded, abaxial surface pale green, pilosulous, adaxial surface green, pilosulous; usually pinnately veined, rarely 3-veined from base.

not fascicled, not crowded;

petiole 1–4 mm;

blade flat to ± cupped or folded lengthwise adaxially, widely elliptic, obovate, or suborbiculate, 10–40(–45) × 5–24 mm, base cuneate to ± rounded, margins not revolute, sometimes slightly thickened, dentate to denticulate most of length, teeth 9–35, apex rounded, truncate, or retuse, abaxial surface pale green, sparsely strigillose or glabrate, adaxial surface dark green, ± shiny, glabrous.

axillary, umbel-like to racemelike, 1.3–4 cm.

axillary, 0.9–2.5 cm.

sepals, petals, and nectary usually blue to pale blue, rarely white.

sepals, petals, and nectary deep blue to bluish purple.

4–5 mm wide, weakly lobed near apex;

valves smooth, crested.

4–6 mm wide, lobed;

valves usually smooth, sometimes rugulose or crested distal to middle, horns subapical, minute, not rugose, intermediate ridges absent.