Flora of North America species comparison

usually prostrate, rarely ascending, 6–22 cm, usually both strigillose and hirsute.

prostrate to ascending, often mat-forming, 7–35 cm, glabrous, pilose, or villous.

opposite;

stipules distinct, subulate-filiform, undivided or divided into 2–4 narrowly triangular to linear-subulate segments, no dark, circular glands at base of stipules, 0.9–1.5 mm, pilose or strigillose;

petiole 0.3–1.2 mm, glabrescent, strigillose, or sericeous;

blade usually ovate or oblong, rarely subrhombic, 4–13 × 3–7 mm, base asymmetric, one side usually angled and other side rounded, margins coarsely serrulate, apex acute, surfaces often with red spot in center, strigillose or sericeous, or adaxial surface glabrescent; 3-veined from base.

opposite;

stipules distinct, divided nearly to base into 3–5 subulate to filiform segments, these sometimes 2-fid toward apex or laciniate, 0.7–2.1 mm, glabrous;

petiole 0.5–1 mm, glabrous, villous, or pilose;

blade ovate, oblong, elliptic, or obovate, 3–13 × 2–7 mm, base asymmetric, rounded to oblique, margins usually entire in proximal 1/2 and serrulate in distal 1/2, rarely serrulate nearly to base, apex obtuse or truncate, surfaces often with red spot in center, not papillate, glabrous, villous, or pilose; weakly 3-veined from base, usually only midvein conspicuous.

obconic, 0.5–0.7 × 0.4–0.6 mm, strigillose;

glands 4, yellow green to pink, circular to slightly oblong, 0.1–0.2 × 0.1–0.2 mm;

appendages absent or white to pink, forming thin rim around edge of gland or oblong, 0.1–0.2 × 0.1–0.3 mm, distal margin entire or shallowly lobed.

obconic, 0.6–1.1 × 0.6–1 mm, glabrous, villous, or pilose;

glands 4, yellow to pink, usually oblong to reniform, 0.1 × 0.2–0.3 mm;

appendages white to pink, oblong or flabellate, rarely absent, (0–)0.1–0.2 × (0–)0.3–0.4 mm, distal margin entire or shallowly lobed.

2–8.

5–20.

ovary strigillose, often canescent when young;

styles 0.1–0.3 mm, 2-fid 1/2 to nearly entire length.

ovary glabrous, villous, or pilose;

styles 0.3–0.4 mm, 2-fid 1/2 length.

ovoid, 1–1.2 × 1–1.3 mm, strigillose;

columella 0.7–1.1 mm.

broadly ovoid to oblate, cocci not elongated nor terminating in empty portion, 1.4–1.9 × 1.5–2, glabrous, pilose, or villous;

columella 1.2–1.6 mm.

orange-brown to pinkish, narrowly ovoid, 4-angled in cross section, 0.7–0.9(–1.1) × 0.5 mm, usually rugulose, with 3–6 faint, low, transverse ridges, rarely almost smooth.

pink, light brown, or grayish, ovoid to narrowly ovoid, 4-angled in cross section, 1–1.4 × 0.6–0.9 mm, smooth to dimpled or rugose, or with faint transverse ridges that do not interrupt abaxial keel.

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

peduncles 0–0.8 mm.

solitary or in small, cymose clusters at distal nodes or on congested, axillary branches;

peduncle 0.4–1.7 mm.