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.

usually erect or ascending, occasionally decumbent, sparingly branched throughout, 2–5(–9) dm, hirsute, puberulent, or glandular basally, hair types often mixed, glandular-puberulent, glabrous, or occasionally puberulent and sparsely hispid 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 2/3 of plant;

larger leaves with petiole 1–5 mm, blade lanceolate to linear, rarely ovate, 15–35 × 1–15 mm (distal leaves usually longer, narrower), adaxial surface glabrous or sparsely hispid, occasionally glandular-pubescent, sometimes punctate, abaxial surface usually paler than adaxial, glabrous or sparsely hispid, occasionally glandular-pubescent, usually punctate with small patches of large gray to dark brown cells, base obtuse, truncate, or rounded, margins entire and revolute, apex usually acute, sometimes obtuse or rounded.

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.

terminal and axillary, forked ca. 2–4 times unequally, open, without sticky internodal bands;

branches strongly ascending, terminating in loose, 1–few-flowered, cymose clusters.

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 1–2(–5) mm;

bracts at base of perianth persistent, 3, lanceolate to ovate-acuminate, 1–2 mm;

perianth purplish pink, widely funnelform beyond constriction, 4–7 mm;

stamens 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.

borne singly (or 2–3 in open clusters), dark gray-brown, oblong-clavate, 2.5–3.5 × 1.2–1.5 mm (l/w: (1.7–)2.1–3.5), apex round, usually glabrous;

ribs (4–)5, broadly rounded, smooth, edges sharp and slightly overhanging sulcus;

sulci about as wide as base of ribs, smooth, not papillate (very rarely minutely and sparsely puberulent).

= ca. 52.