Flora of North America species comparison

erect or ascending, occasionally decumbent, moderately or profusely branched, primarily distally, 1–5 dm, minutely puberulent with bent hairs basally, glabrous or minutely puberulent distally.

decumbent to erect, usually profusely branched throughout, 2–15 dm, usually minutely pubescent, rarely glabrous basally, usually glabrous, rarely sparsely and minutely pubescent distally.

mostly in basal 1/2 of plant;

larger leaves with petiole 4–8[–15] mm, blade broadly ovate or oval to lanceolate, 10–21[–35] × 6–8[–13] mm (distal leaves smaller, proportionately narrower), adaxial surface usually glabrous, rarely minutely puberulent, abaxial surface paler than adaxial, glabrous, neither surface punctate, base round [obtuse], margins shallowly sinuate, apex acute, obtuse, or round.

mostly in basal 1/2 of plant;

larger leaves with petiole 3–25 mm, blade broadly rhombic to elliptic-oblong, broadly to narrowly ovate, occasionally wider than long, 18–45 × 13–50 mm (distal leaves smaller, proportionately narrower), adaxial surface glabrous, abaxial surface much paler than adaxial surface, glabrous or with hairs on veins, neither surface punctate, base usually obtuse to round, sometimes shallowly cordate, margins entire or sinuate, often undulate, apex acute, obtuse, or round.

terminal or axillary, forked ca. 3–6 times ± evenly (or clearly unevenly), diffuse, with sticky internodal bands;

branches usually terminating in umbels or flowers borne singly, usually well beyond leaves.

axillary or terminal, forked ca. 6–8 times unequally, diffuse, without sticky internodal bands;

branches divergent, terminating in 1(–3) flowers.

pedicel 0.3–4.5 mm;

bracts at base of perianth quickly deciduous, 2, linear-lanceolate to lanceolate [ovate], 0.5–0.6 mm;

perianth whitish to pale pink or purplish, campanulate beyond constriction, 1 mm;

stamens 2–3, included or barely exserted.

pedicel slender, 3–13 mm;

bracts at base of perianth quickly deciduous, 2–3, linear-lanceolate to broadly lanceolate, 0.3–1.5 mm, quickly deciduous;

perianth wine red to brick red, widely funnelform distal to constriction, 2–4.5 mm;

stamens (4–)5(–6), well exserted.

1–7 per umbel, straw colored or gray-brown, obpyramidal, 2.5–3.1 × 1.3–1.9 mm (l/w: 1.6–2.1), base stipelike, apex round-truncate, glabrous;

ribs 3–4(–5), acute or winglike, tapering to pedicel, slightly rugose or undulate near sulci;

sulci 0.5–1 times as wide as base of ribs, coarsely transversely rugose, smooth or very faintly papillate.

usually borne singly, gray-brown to brown, oblong-clavate, 2.8–4.2 × 1–1.5 mm (l/w: [2–]2.2–3.5[–3.8]), apex round to rounded-conic, minutely puberulent, sometimes minutely glandular, rarely glabrous;

ribs 5, rounded, smooth or slightly rugose near sulci;

sulci 1–2.5 times as wide as base of ribs, not rugose, smooth or minutely papillate.