Flora of North America species comparison

prostrate, occasionally mat-forming, 10–43 cm, glabrous.

erect or ascending, usually unbranched, occasionally few branched, solitary or few, previous year's dead stems not persistent, 20–100 cm, glabrous or slightly pilose to villous.

opposite;

stipules usually distinct, occasionally connate at base, filiform, 1–1.2(–2.8) mm, usually glabrous, rarely pilose;

petiole 0.4–1 mm, usually glabrous;

blade ovate to oblong, 4.4–12 × 2.6–7.6 mm, base asymmetric, cordate to rounded, margins entire, apex rounded to mucronulate, surfaces glabrous;

only midvein conspicuous.

alternate, ascending;

stipules 0.1–0.2 mm;

petiole minute or absent;

blade oblanceolate, obovate, or elliptic, 25–55 × 5–12 mm, base cuneate to rounded, margins entire, occasionally slightly revolute, apex rounded to subacute, abaxial surface glabrous or pilose to villous, adaxial surface usually glabrous, rarely villous;

venation occasionally obscure on small leaves, midvein conspicuous.

campanulate, 1–1.3 × 1–1.3 mm, glabrous;

glands 4, yellowish to pink, elliptic, 0.3–0.5 × 0.5–1 mm;

appendages whitish to pink, sometimes drying red, elliptic to ovoid, 1.1–1.5 × 1.2–1.9 mm, distal margin entire, retuse, or erose.

campanulate, 1.2–1.5 × 1.2–1.5(–2) mm, glabrous or moderately puberulent (especially near glands);

glands 5, green, reniform, 0.5 × 0.8–1 mm;

appendages white, flabellate, 2.5–3.5(–4.5) × 2.5–3.2 mm, entire.

5–40.

20–25.

ovary glabrous;

styles 0.5–0.8 mm, 2-fid nearly entire length.

ovary glabrous;

styles 0.8–1.4 mm, 2-fid at apex to 1/2 length.

ovoid, 2–3 mm diam., glabrous;

columella 1.2–2.7 mm.

globose, 2.3–3 × 3.5–4.2 mm, glabrous;

columella 2–2.5 mm.

gray or tan with dark brown mottling, ovoid, bluntly 3–4-angled in cross section, 1.8–2.1 × 1.2–1.4 mm, smooth to rugose.

white or light gray, ovoid, 2.5–2.8 × 2.2 mm, with shallow and coarse depressions;

caruncle absent.

solitary at distal nodes;

peduncle 0.9–3 mm.

in terminal pleiochasia, dichasial bracts occasionally whorled or rarely alternate;

peduncle (1.5–)5–11(–13) mm (proximal to 70 mm), glabrous.