Flora of North America species comparison

prostrate to ascending or erect, not mat forming, 10–35 cm, usually sparsely to moderately strigillose, pilose, or villous, rarely glabrate hairs sometimes in longitudinal lines.

prostrate, mat-forming, 5–35 cm, glabrous or shortly pilose.

opposite;

stipules distinct or connate, triangular to narrowly triangular or laciniate into subulate to filiform divisions, 0.6–1.3 mm, glabrous or sparsely pilose;

petiole 0.2–0.9 mm, glabrous, villous, or strigillose;

blade ovate, oblong, or elliptic, often falcate, 5–18 × 3–9 mm, base asymmetric, one side rounded and other cordate, margins usually serrulate especially in distal 1/2, rarely nearly entire, apex acute or obtuse, surfaces not papillate, sparsely pilose, villous, or sericeous (especially near base), often glabrate (especially older leaves); 3–5-veined from base.

opposite;

stipules distinct, subulate, 0.2–0.4 mm, pilose;

petiole 0.5–1.2 mm, glabrous or pilose;

blade ovate to elliptic, 6–15 × 2–4 mm, base asymmetric, one side cuneate to rounded, other side rounded, margins entire, apex obtuse, surfaces glabrous or pilose;

venation obscure or only midvein conspicuous.

obconic, 0.7–1.1 × 0.5–0.8 mm, glabrous;

glands (2–3)–4, red to reddish green, circular to oblong, 0.1 × 0.1–0.2 mm;

appendages absent or white, turning pink with age, flabellate, oblong, circular, or forming narrow lunate border around margin of gland, 0.1–0.3 × 0.2–0.4 mm, distal margin entire or slightly lobed.

campanulate, 0.4–0.6 × 0.5–0.9 mm, glabrous or pilose;

glands 4, red, circular to oblong, 0.1 × 0.1–0.2 mm;

appendages absent.

5–15.

2–5.

ovary glabrous;

styles 0.3–0.5 mm, 2-fid 1/2 length.

ovary usually glabrous, rarely pilose;

styles 0.1–0.2 mm, 2-fid at apex.

oblate to subglobose, cocci not elongated nor terminating in empty portion, 1.4–1.8 × 1.7–2.1 mm, glabrous;

columella 1.1–1.5 mm.

oblong, 1.3–1.5 × 1.1–1.3 mm, usually glabrous, rarely pilose;

columella 1–1.2 mm.

brown, gray, or almost black, ovoid to oblong, 3–4-angled in cross section, 1.1–1.4 × 0.7–0.8 mm, rugulose and sometimes also with low transverse ridges that do not interrupt abaxial keel.

light gray, narrowly ovoid, 4-angled in cross section, 0.9–1 × 0.5–0.6 mm, smooth to slightly rugose or with 1–4 faint transverse ridges that do not pass through abaxial keel.

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

peduncle 0.2–2.5 mm.

solitary at distal nodes;

peduncle 0.4–1.4 mm.