Flora of North America species comparison

usually erect, sometimes decumbent, profusely branched primarily distally, 2–12 dm, minutely puberulent with bent hairs basally, usually glabrous, rarely sparsely puberulent distally.

usually erect or ascending, occasionally decumbent, branched several times, primarily distally, 3–6 dm, minutely puberulent with bent hairs and sometimes also glandular hairs in basal portions; sparsely to moderately puberulent distally.

mostly in basal 1/2 of plant;

larger leaves with petiole 6–40(–55) mm, blade broadly rhombic-ovate, triangular-ovate, ovate, oval, or lanceolate, 20–50(–80) × 10–45 mm (distal leaves smaller, proportionately narrower), adaxial surface usually glabrous, sometimes minutely puberulent, usually minutely punctate, abaxial surface slightly paler than adaxial, usually glabrous, sometimes minutely puberulent, usually punctate with small patches of small brown cells, base obtuse to round, margins entire or sinuate, apex usually acute, less often obtuse or rounded.

mostly in basal 1/2 of plant;

larger leaves with petiole 12–17 mm, blade oblong-lanceolate, 25–50 × 10–17 mm (distal leaves smaller, sometimes longer, proportionately narrower), adaxial surface glabrous or very sparsely puberulent, often punctate, abaxial surface paler than adaxial, glabrous or very sparsely puberulent, usually punctate with small dark brown cells, base round, obtuse, or truncate, margins entire or slightly and irregularly crenulate, apex broadly to narrowly acute.

terminal, forked ca. 4–6 times ± evenly, diffuse, usually with sticky internodal bands;

branches strongly ascending, terminating in irregular umbellate or subracemose clusters of flowers, not all pedicels attaching at same point (flowers occasionally borne singly).

terminal, forked ± unevenly ca. 3–4 times, with sticky internodal bands;

branches strongly ascending, terminating in umbels (rarely flowers borne singly).

pedicel (0–)0.3–2.5(–5) mm;

bracts at base of perianth deciduous, usually 2, narrowly to broadly lanceolate, 0.5–1 mm, apex often acuminate;

perianth whitish, usually tinged with pink or purple [bright pink] between lobes and in tube, campanulate beyond constriction, 1–1.5 mm;

stamens 2–4, slightly exserted.

pedicel 1–2 mm;

bracts at base of perianth quickly deciduous, 2, lanceolate, 0.6–1.5 mm;

perianth whitish to pale pink, campanulate distal to constriction, 1–1.5 mm;

stamens 3–4, barely exserted.

1–11 per cluster, pale greenish to straw colored or tan, narrowly obconic, (2.7–)3–3.5[–4] × 1.2–1.5 mm (l/w: (2–)2.3–3.2), apex truncate or broadly low conic, glabrous;

ribs 5, acute, slightly rugose adjacent to sulci;

sulci 0.5–1 times as wide as base of ribs, slightly to prominently coarsely transverse rugose, not papillate.

(1–)3–14 per umbel, straw colored at maturity, broadly obconic, emarginate in profile (wings extended beyond apex of body), 3.2–3.8 × 2.2–2.6 mm (l/w: 1.3–1.5), glabrous;

ribs 5, winglike, smooth;

sulci 1–2 times as wide as base of ribs, smooth or very slightly rugose, not papillate.