Flora of North America species comparison

prostrate, occasionally mat-forming, 10–43 cm, glabrous.

erect to ascending, 5–25 cm, glabrous.

opposite;

stipules usually distinct, occasionally connate at base, filiform, 1–1.2(–2.8) mm, usually glabrous, rarely pilose;

petiole 0.4–1 mm, usually glabrous;

blade ovate to oblong, 4.4–12 × 2.6–7.6 mm, base asymmetric, cordate to rounded, margins entire, apex rounded to mucronulate, surfaces glabrous;

only midvein conspicuous.

opposite;

stipules distinct, subulate-filiform, entire, 0.3–0.5 mm, glabrous;

petiole 0.4–0.9 mm, glabrous;

blade narrowly oblong to linear, often slightly falcate, 2–15 × 0.3–0.8 mm, base symmetric to subsymmetric, rounded to attenuate, margins entire, thickened and often revolute, apex acute to obtuse, surfaces glabrous;

only midvein conspicuous.

campanulate, 1–1.3 × 1–1.3 mm, glabrous;

glands 4, yellowish to pink, elliptic, 0.3–0.5 × 0.5–1 mm;

appendages whitish to pink, sometimes drying red, elliptic to ovoid, 1.1–1.5 × 1.2–1.9 mm, distal margin entire, retuse, or erose.

turbinate, 0.4–0.5 × 0.4–0.6 mm, glabrous;

glands 4, yellow to pink, oblong to slightly reniform, (0–)0.1–1 × 0.1–0.2 mm;

appendages white to pink, ovate to oblong, 0.2–0.4 × 0.1–0.3 mm, distal margin usually entire, rarely emarginate.

5–40.

5–12.

ovary glabrous;

styles 0.5–0.8 mm, 2-fid nearly entire length.

ovary glabrous;

styles 0.1–0.2 mm, 2-fid 1/2 length.

ovoid, 2–3 mm diam., glabrous;

columella 1.2–2.7 mm.

broadly ovoid, 1.1–1.4 mm diam., glabrous;

columella 0.8–1.1 mm.

gray or tan with dark brown mottling, ovoid, bluntly 3–4-angled in cross section, 1.8–2.1 × 1.2–1.4 mm, smooth to rugose.

orange to tan or reddish brown, narrowly ovoid, 4-angled in cross section, 0.9–1.1 × 0.5–0.6 mm, smooth.

solitary at distal nodes;

peduncle 0.9–3 mm.

solitary at distal nodes;

peduncle 0.1–0.9 mm.