Flora of North America species comparison

usually erect or ascending, occasionally decumbent, leafy mostly in proximal 2/3 of plant, openly forked distally, 4–15 dm, basally usually glabrous or puberulent in 2 lines, rarely spreading-pubescent; distally stems usually puberulent in 2 lines, occasionally glabrate, rarely spreading glandular-pubescent.

erect or ascending, few, sparsely leafy mostly in proximal 1/2, well branched, 5–10 dm, glabrate to sparsely spreading viscid-pubescent throughout, more densely so distally.

ascending at 45–80°, abruptly reduced to inflorescence;

petiole 0.2–2 cm;

blade green, ovate-lanceolate to ovate or triangular, 3–10 × 2–6.5 cm, usually ± thin, base obtuse, round, truncate, or cordate, apex acute to acuminate, rarely rounded, surfaces usually glabrous, sometimes puberulent or sparsely hispidulous.

ascending to spreading at 45–80°, abruptly reduced in inflorescence;

petiole 0.3–4 cm;

blade green, triangular-ovate to ovate, 2–7 × 2–7 cm, thick and moderately fleshy, base round to cordate, apex acute to rounded, surfaces glabrate to glandular.

terminal and in upper axils, subumbellate clusters at ends of long, forked branches;

peduncle 5–20 mm, usually pubescent with ascending, often curved, glandular or eglandular hairs, crosswalls of hairs pale;

involucres pale green, often tinged pinkish, widely bell-shaped to almost rotate, 4–6 mm in flower, 8–15 mm in fruit, glabrous or glabrate but with minute curved hairs on margins, or rarely puberulent or pilose throughout, 50–90% connate, lobes ovate to broadly ovate.

terminal and in distal axils, few branched, ± evenly forked, open;

peduncle 2–6 mm, spreading viscid-pubescent, crosswalls of hairs pale or dark;

involucres pale green, widely bell-shaped to almost rotate, 3–4 mm in flower, 6–13 mm in fruit, sparsely spreading viscid-pubescent, 90–100% connate, lobes round to very broadly obtuse.

(2–)3(–5) per involucre;

perianth usually pink to reddish purple, rarely white, 1 cm.

2–3 per involucre;

perianth pale pink to pink, 0.8–1 cm.

dark grayish brown to reddish brown (ribs and tubercles usually slightly paler), narrowly obovate and tapering at both ends, 3.4–5 mm, shaggy-pubescent with spreading, sometimes tufted, hairs, 0.3–0.4 mm, sometimes also with layer of minute hairs;

ribs usually irregularly and deeply notched, especially toward apex, round to bluntly angled, 0.5–0.75 times width of sulci, 0.5–1 times as wide as high;

sulci with pale small to tall tubercles that are sometimes horizontally lengthened and shelflike.

reddish brown to brown, obovoid, 3–4 mm, densely glandular-puberulent with hairs 0.1 mm;

ribs low and round, as wide as sulci, 0.5 times as wide as high, covered with tall, shelflike tubercles;

sulci with prominent shelflike tubercles.

= 58.