Flora of North America species comparison

erect to ascending, 15–50 cm, glabrous.

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

opposite;

stipules connate, deltate, usually entire, sometimes laciniate-fringed at tip, 1.5–2.2 mm, glabrous;

petiole 1–3 mm, glabrous;

blade obliquely oblong-oblanceolate, 10–35 × 7–15 mm, base asymmetric, oblique, margins serrate or serrulate, especially toward apex, apex broadly acute, surfaces glabrous; palmately veined at base, pinnate distally.

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.

obconic, 0.9–1.1 × 0.4–0.9 mm, glabrous;

glands 4, yellow-green to brown, stipitate, subcircular, 0.2 × 0.2 mm, occasionally nearly rudimentary;

appendages absent on smaller glands or white to pink, shape highly variable, usually round to ± elliptic, 0.3–0.4 × 0.5–0.7 mm, distal margin entire.

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.

(0–)2–20.

5–40.

ovary glabrous;

styles 0.4 mm, 2-fid 1/2 length.

ovary glabrous;

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

depressed-globoid, 1.3–1.4 × 1.1–1.5 mm, glabrous;

columella 1–1.1 mm.

ovoid, 2–3 mm diam., glabrous;

columella 1.2–2.7 mm.

with very thin whitish mucilaginous coat over light brown testa below, ovoid-triangular, bluntly 4-angled in cross section, 0.9–1.1 × 0.5 mm, with shallow irregular depressions alternating with low, smooth ridges.

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.

in dense, axillary and terminal, capitate glomerules with reduced, bractlike leaves subtending cyathia;

peduncle 0.5–1.8 mm.

solitary at distal nodes;

peduncle 0.9–3 mm.