Flora of North America species comparison

prostrate to reclining, not mat-forming, 5–30 cm, glabrous.

prostrate to ascending, often mat-forming, 7–35 cm, glabrous, pilose, or villous.

opposite;

stipules usually distinct, occasionally connate basally on lower side of stem, subulate or scalelike, usually entire, occasionally 2-fid or margin sparsely ciliate, 0.4–1 mm, glabrous;

petiole 0.7–1.2(–1.5) mm, glabrous;

blade ovate, oblong, orbiculate, or obovate, 2–7.1 × 1–3.5 mm, base slightly asymmetric, rounded, margins entire, often revolute on drying, apex usually rounded, occasionally slightly emarginate, surfaces glabrous;

venation usually obscure, only midvein conspicuous.

opposite;

stipules distinct, divided nearly to base into 3–5 subulate to filiform segments, these sometimes 2-fid toward apex or laciniate, 0.7–2.1 mm, glabrous;

petiole 0.5–1 mm, glabrous, villous, or pilose;

blade ovate, oblong, elliptic, or obovate, 3–13 × 2–7 mm, base asymmetric, rounded to oblique, margins usually entire in proximal 1/2 and serrulate in distal 1/2, rarely serrulate nearly to base, apex obtuse or truncate, surfaces often with red spot in center, not papillate, glabrous, villous, or pilose; weakly 3-veined from base, usually only midvein conspicuous.

usually turbinate-campanulate to hemispheric, occasionally suburceolate, 1–1.8 × 0.9–1.4 mm, glabrous;

glands 4, yellow-green to red-purple, sessile or short-stipitate, subcircular to slightly elliptic, 0.2–0.5 × 0.2–0.7 mm;

appendages absent or white to pink, semilunate or forming rim at edge of gland, (0–)0.1–0.4 × (0–)0.3–0.9 mm, entire or slightly crenate.

obconic, 0.6–1.1 × 0.6–1 mm, glabrous, villous, or pilose;

glands 4, yellow to pink, usually oblong to reniform, 0.1 × 0.2–0.3 mm;

appendages white to pink, oblong or flabellate, rarely absent, (0–)0.1–0.2 × (0–)0.3–0.4 mm, distal margin entire or shallowly lobed.

15–36.

5–20.

ovary glabrous;

styles 0.3–0.5 mm, 2-fid 1/2 length.

ovary glabrous, villous, or pilose;

styles 0.3–0.4 mm, 2-fid 1/2 length.

broadly ovoid, 1.1–1.6 × 1.5–1.8 mm, glabrous;

columella 1.2–1.5 mm.

broadly ovoid to oblate, cocci not elongated nor terminating in empty portion, 1.4–1.9 × 1.5–2, glabrous, pilose, or villous;

columella 1.2–1.6 mm.

whitish, reddish brown beneath coat, ovate, 4-angled in cross section, 0.8–1.2 × 0.5–0.8 mm, with (2–)3(–5) deep transverse ridges.

pink, light brown, or grayish, ovoid to narrowly ovoid, 4-angled in cross section, 1–1.4 × 0.6–0.9 mm, smooth to dimpled or rugose, or with faint transverse ridges that do not interrupt abaxial keel.

usually solitary at distal nodes, rarely clustered on short, axillary branches;

peduncle 0.3–1.3 mm.

solitary or in small, cymose clusters at distal nodes or on congested, axillary branches;

peduncle 0.4–1.7 mm.

= 28.