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 or spreading, arcuate, often rooting at distal nodes;

branchlets brown to grayish brown, rigid, puberulent, glabrescent.

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.

both fascicled and not on same plant, axillary short shoots erect;

petiole 1–2 mm;

blade folded lengthwise abaxially, elliptic to oblanceolate, 4–12 × 2–6 mm, base obtuse to cuneate, margins not revolute, entire or denticulate near apex, teeth 3–5, apex obtuse, abaxial surface pale green, glabrate or sparsely strigillose between the veins, adaxial surface green, glabrate.

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

terminal or axillary, 0.6–1.4 cm.

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

sepals and petals white to pale blue;

nectary blue.

4–5 mm wide, weakly lobed near apex;

valves smooth, crested.

4–5 mm wide, usually not, sometimes weakly lobed;

valves smooth or slightly rugulose, sometimes ridged, horns absent or weakly developed bulges, intermediate ridges absent.