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.

prostrate, spreading and often mat-forming, 10–100 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.

opposite;

stipules usually distinct, occasionally connate basally, rarely to middle, subulate, narrowly triangular, or divided into 2–4 subulate segments, 0.5–1.1 mm, glabrous;

petiole 1–3.6 mm, glabrous;

blade oblong to obovate, 5–12 × 3–5 mm, base subsymmetric, cuneate to attenuate, margins entire, apex usually acute to mucronulate, rarely obtuse, surfaces glabrous;

only midvein conspicuous.

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 to obconic, 1.5–2 × 1.3–2.5 mm, glabrous;

glands 4, yellowish, subcircular to oblong, 0.5–0.6 × 0.5–0.6 mm;

appendages white, ovate to oblong or almost triangular, 0.3–0.6 × 0.3–0.8 mm, distal margin entire or shallowly 2–3-lobed.

5–28.

45–50.

ovary glabrous;

styles 0.6–2.5 mm, 2-fid 1/2 length.

ovary glabrous, styles 0.4–0.6 mm, 2-fid 1/2 length.

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

columella 1.4–1.6 mm.

ovoid to ellipsoid, 2.7–3.2 × 2.2–2.9 mm, glabrous;

columella 2.6–2.8 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.

whitish, pinkish, or light brown, ellipsoid-oblong, weakly dorsiventrally compressed and semielliptic in cross section, 2.2–2.5 × 1.3–1.6 mm, with sharp linelike longitudinal ridge on adaxial side, smooth and rounded on back.

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

peduncle 0.5–2.5 mm.

solitary at distal nodes;

peduncle 1.6–4.1 mm.

= 12, 14, 22.