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.

erect to ascending, or nearly decumbent in shifting sand, 25–60 cm, glabrous.

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 connate, forming conspicuous, ligulate or deltate scale, short cleft or fringed, 1–1.8 mm, glabrous;

petiole 0.5–1 mm, glabrous;

blade ovate to elliptic often folded along midrib, 5–12 × 3–8 mm, ± fleshy, base slightly asymmetric, truncate to cordate, partially obscuring stem, margins entire, apex usually obtuse, rarely acute, surfaces yellowish to dark green, glabrous glaucous; obscurely 3–5-veined at base, pinnate distally, 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, 1–1.6 × 0.7–1.2 mm, glabrous;

glands 4, brown, usually elliptic, occasionally almost round, 0.2–0.4 × 0.5–0.7 mm, fleshy;

appendages white, oblong, rarely rudimentary, 0.2–0.4 × 0.5–0.9 mm, distal margin entire or undulate.

5–15.

12–20.

ovary glabrous;

styles 0.3–0.5 mm, 2-fid 1/2 length.

ovary glabrous;

styles 0.3–0.4 mm, 2-fid 1/2 length.

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.

subglobose subtended by calyxlike structure, 1.5–2 × 2.2–2.8 mm, glabrous;

columella 1–1.5 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.

ashen, broadly ovoid, angled in cross section, faces plump, convex, 1.2–1.3 × 0.9–1.2 mm, obscurely pitted.

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

peduncle 0.2–2.5 mm.

solitary at distal nodes;

peduncle 0.5–1 mm.