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.

usually prostrate to ascending, rarely erect, sometimes rooting at proximal nodes;

branchlets reddish to grayish brown, rigid, smooth to slightly ridged, tomentulose, 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.

not fascicled;

petiole 1–2 mm;

blade flat or cupped, obovate to oblong-obovate, 8–20 × 4–12(–15) mm, base cuneate, margins thick to revolute, usually entire, sometimes denticulate near apex, teeth 3–5, apex acute to rounded, truncate, or retuse, abaxial surface grayish green, tomentulose, adaxial surface green, glabrous.

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

axillary, 0.8–1.5 cm.

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

sepals and petals pale to deep blue, sometimes tinged with lavender;

nectary dark purplish green.

4–5 mm wide, weakly lobed near apex;

valves smooth, crested.

5–8 mm wide, not to weakly lobed;

valves smooth, horns subapical, minute, erect, intermediate ridges absent.