Flora of North America species comparison

erect to ascending, 15–50 cm, glabrous.

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

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 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.

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 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.

(0–)2–20.

3–7.

ovary glabrous;

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

ovary villous;

styles 0.3–0.4 mm, 2-fid 1/2 length.

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

columella 1–1.1 mm.

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

columella 0.9–1.1 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.

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.

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

peduncle 0.5–1.8 mm.

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

peduncle 0.2–1.6 mm.