Flora of North America species comparison

erect or ascending, sparingly branched throughout, 30–70 dm, densely glandular-villous, or glandular-puberulent, with spreading, nonglandular hairs basally, glabrous distally.

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.

mostly in basal 1/2;

larger leaves with petiole 10–30 mm, blade oval, oblong, ovate, or ± triangular, 18–45 × 13–30 mm (distal leaves usually smaller, sometimes longer, proportionately narrower), adaxial surface lightly to densely glandular-pubescent, abaxial surface paler than adaxial, lightly to densely glandular-pubescent, neither surface punctate or both minutely punctate with clusters of brown cells, base truncate, round, or obtuse, margins sinuate, sometimes crisped, apex round to obtuse, rarely acute.

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.

terminal and axillary, branched 1–4 times unequally, with sticky internodal bands;

branches strongly ascending, terminating in spicate or racemose flower clusters, axis 10–55 mm.

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.

pedicel 0.4–2.3[–3.7] mm;

bracts at base of perianth usually soon deciduous, usually 2, narrowly to broadly lanceolate, 0.7–1.8 mm, apex often acuminate;

perianth white to pale pink, campanulate distal to constriction, 1–1.3 mm;

stamens (2–)3, slightly exserted or included.

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.

5–33 per cluster, usually overlapping or 2–4 in group separated by small gap from next group, straw colored to grayish or reddish tan, broadly obovoid, 1.9–2.4(–2.8) × 1.1–1.3 mm (l/w: 1.7–2.1[–2.3]), apex rounded, glabrous;

ribs 5, obtuse-rounded to obtuse, often with low winglike ridge, slightly rugose near sulci;

sulci (0.2–)0.5 times as wide as base of ribs, slightly rugose, not papillate.

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.

= ca. 52.