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.

procumbent or decumbent to ascending, sparingly branched throughout, 1–4 dm, minutely puberulent with bent hairs throughout.

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.

± throughout;

larger leaves with petiole 3–12 mm, blade rhombic-ovate to ovate or lanceolate, 15–25 × 9–15 mm (distal leaves smaller, proportionately narrower), adaxial surface glabrous or sparsely puberulent, abaxial surface paler than adaxial, glabrous, neither surface punctate, base round to obtuse, margins entire or slightly sinuate, apex 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 or axillary, without sticky internodal bands;

peduncle, 1–3 cm, bearing small capitate clusters of flowers.

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 0.3–0.6 mm;

bracts at base of perianth quickly deciduous, lance-acuminate, 0.4–0.7 mm;

perianth white to pale pinkish, campanulate distal to constriction, 1–1.5 mm;

stamens 2, included or 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.

2–8 per cluster, pale green to straw colored, broadly obpyramidal, base tapered to stipelike above pedicel, 2.9–3.4 × 2.8–3.2 mm (l/w: 1–1.4), apex truncate, glabrous;

ribs 3–4, winglike, smooth;

sulci 3–4 times as wide as base of ribs, coarsely transversely rugose, not papillate.