Flora of North America species comparison

prostrate, mat-forming, 5–50 cm, villous with glistening glandular hairs.

erect to ascending, sometimes slightly woody at base, not mat-forming, 15–60 cm, usually glabrous, young branches rarely very sparsely short pubescent.

opposite;

stipules distinct, filiform, rudimentary to 0.2 mm, glabrous or sparsely villous with glistening glandular hairs;

petiole 0.5–1.5 mm, villous;

blade oblong, ovate, or elliptic, 3–7 × 2–4 mm, base asymmetric, rounded, margins entire, apex obtuse, surfaces villous; weakly 3-veined from base, commonly only midvein conspicuous.

opposite;

stipules usually distinct, occasionally connate basally, triangular, entire or 2–4 parted, apically ciliate, 0.3–0.4 mm, usually glabrous, rarely very sparsely short pubescent;

petiole 0.5–1.5 mm, usually glabrous, rarely very sparsely short pubescent;

blade ovate, oval, elliptic, oblong-elliptic, or linear-elliptic, 4–12 × 1–7 mm, base asymmetric, rounded or subcordate, margins usually entire, rarely sparsely serrate, apex obtuse to acute, sometimes mucronate, surfaces abaxially often purple or red, adaxially green, usually glabrous, rarely very sparsely short pubescent; 3-veined from base, only midvein conspicuous.

campanulate or urceolate, 0.7–1 × 0.5–0.8 mm, villous;

glands 4, red to pink, oblong to slightly reniform, 0.1–0.2 × 0.2–0.3 mm;

appendages white to pink, deeply incised into 3–6 triangular to subulate, attenuate, acute segments, 0.3–0.6 × 0.6–1 mm, segments entire.

turbinate to campanulate, 0.7–1 × 0.8–1 mm, usually glabrous, rarely very sparsely short pubescent;

glands 4, brown, slightly concave, elliptic-oblong, 0.1–0.2 × 0.3–0.6 mm;

appendages white or pink to dark red, usually oblong or flabellate, occasionally rudimentary and forming narrow rim at edge of gland, (0–)0.1–0.2 × 0.4–1 mm, distal margin entire or crenulate.

3–7.

8–14.

ovary villous;

styles 0.3–0.4 mm, 2-fid 1/2 length.

ovary glabrous, subtended by triangular calyxlike structure;

styles 0.4–0.6 mm, 2-fid 1/2 length.

subglobose to ovoid, 1–1.2 mm diam., villous;

columella 0.9–1.1 mm.

broadly ovoid, 1–1.5 × 1.7–2.1 mm, glabrous;

columella 1–1.4 mm.

pink to light gray, narrowly ovoid, 4-angled in cross section, 0.8–1 × 0.5–0.6 mm, dimpled or with faint transverse ridges that do not pass through abaxial keel.

reddish brown, ovoid, 4-angled in cross section, 0.7–1 × 0.6–0.7 mm, smooth or obscurely wrinkled.

solitary at distal nodes, nodes often congested toward tips of branches;

peduncle 0.2–1.6 mm.

solitary at distal nodes;

peduncle 0.5–1.1 mm.