Flora of North America species comparison

erect to ascending, 15–50 cm, glabrous.

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 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 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.

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.

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.

(0–)2–20.

8–14.

ovary glabrous;

styles 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.

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

columella 1–1.1 mm.

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

columella 1–1.4 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.

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

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

peduncle 0.5–1.8 mm.

solitary at distal nodes;

peduncle 0.5–1.1 mm.