Flora of North America species comparison

usually ascending, occasionally erect, often arched at tips, 20–80 cm, sparsely to moderately pilose to villous or with short, incurved hairs, hairs often concentrated at nodes and distally, occasionally in 2 bands along opposite sides of stem.

erect or ascending, branched, solitary, few, or occasionally densely clumped, previous year's dead stems not persistent, 18–33 cm, glabrous.

opposite;

stipules usually distinct, sometimes connate basally on one side of stem, small scales, irregularly toothed, fringed, or divided, 1–1.5 mm, sparsely to moderately villous distally;

petiole 0.3–1.6 mm, moderately pilose to villous;

blade oblong to oblong-lanceolate, 8–40 × 3–12 mm, base asymmetric, one side usually angled or rounded, other side ± truncate to cordate-auriculate, margins serrulate, apex angled with blunt tip, abaxial surface pale green or faintly to strongly reddish tinged, adaxial surface usually reddish-mottled or with conspicuous reddish spot, both surfaces usually sparsely to moderately pilose, especially toward base, sometimes glabrous; 3–5-veined from base, pinnate distally, veins faint.

alternate;

stipules to 0.1 mm;

petiole minute or absent;

blade linear to filiform, 10–20 × 0.8–1.5(–4) mm, base cuneate, margins entire, often involute, apex rounded, surfaces glabrous;

venation usually obscure, midvein visible at base of wider leaves.

narrowly obconic, 0.5–1 × 0.3–0.7 mm, glabrous;

glands 4, usually green, sometimes reddish purple, oblong to nearly circular, 0.2–0.4 × 0.3–0.5 mm;

appendages white or pinkish, ovate to broadly elliptic, 0.2–1 × 0.2–1.5 mm, distal margin entire.

campanulate, 1.2–2 × 1.3–1.8 mm, glabrous or strigose on distal extreme;

glands 5, red, elliptic, 0.5 × 1 mm;

appendages white, orbiculate, 0.5–0.8 × 1.3–1.5 mm, erose.

5–28.

20–25.

ovary glabrous;

styles 0.6–2.5 mm, 2-fid 1/2 length.

ovary glabrous;

styles 0.6–1 mm, 2-fid at apex.

ovoid, 1.6–2.3 × 1.5–2.4 mm, glabrous;

columella 1.4–1.6 mm.

globose, 2.3–2.8 × 4.3–5.1 mm, glabrous;

columella 2.5–3.2 mm.

dark brown, sometimes with thin, white coating (often more persistent along angles than faces), elliptic-ovoid to ovoid, rounded-angular in cross section, 1–1.6 × 0.5–0.8 mm, surface finely and irregularly wrinkled, sometimes faintly so, or with indistinct, shallow, rounded cross ridges.

ashy gray, ovoid, 2.9 × 2 mm, with obscure shallow depressions;

caruncle absent.

solitary at distal nodes or in small, cymose clusters at branch tips;

peduncle 0.5–2.5 mm.

in terminal dichasia or pleiochasia;

peduncle 2–6 mm (to 20 mm for central cyathium), glabrous.

= 12, 14, 22.