Flora of North America species comparison

usually prostrate, occasionally with ascending tips, often mat-forming, not rooting at nodes, 5–45 cm, densely and evenly short-sericeous to sericeous or villous.

prostrate to decumbent or ascending, branched (often near base), 7–45 cm, densely pilose.

opposite;

stipules distinct, linear-subulate, sometimes irregularly 2–3-lobed, 1–1.3 mm, sparsely short-sericeous to sericeous or villous;

petiole 0.5–1.5 mm, moderately short-sericeous to sericeous or villous;

blade oblong-ovate to ovate-elliptic or oblong-elliptic, 4–18 × 2.5–8 mm, base strongly asymmetric, one side usually angled and other ± truncate and expanded into small, rounded auricle, margins serrulate (longer side) or subentire (shorter side), apex rounded or broadly acute, abaxial surface pale grayish green, moderately to densely lanulose to villous, adaxial surface usually with irregular reddish streak along midvein, glabrate or with sparse, long, slender hairs; palmately veined at base, pinnate distally.

alternate;

stipules to 0.1 mm;

petiole (0.7–)1.1–3.5 mm, pilose;

blade ovate to orbiculate, 4.6–17(–25) × 4.5–15(–19) mm, base cordate, margins entire, apex rounded to obtuse, surfaces densely pilose;

venation obscure, usually only midvein conspicuous.

obconic, 0.8–1 × 0.6–0.8 mm, sparsely strigose to short-sericeous;

glands 4, green to yellow-green, turning pink with age, usually ± unequal, narrowly oblong to nearly linear, 0.1–0.2 × 0.2–0.5 mm;

appendages white to reddish tinged, lunate to oblong, 0.1–0.3 × 0.2–1.5 mm, distal margin crenulate.

campanulate, 1–1.3 × 1.2–1.4 mm, pilose;

glands 4, yellow to green, elliptic, 0.2–0.3 × 0.5–0.6 mm;

appendages green, elliptic, 0.4–0.5 × 0.5–0.9 mm, entire or crenulate, ciliate.

2–5.

5–10.

ovary sericeous;

styles 0.3–0.4 mm, 2-fid at apex.

ovary pilose;

styles 0.4–0.7 mm, 2-fid 1/2 length.

ovoid, well exserted from involucre at maturity, 1.3–1.5 × 1.2–1.4 mm, sparsely to moderately and evenly sericeous;

columella 1–1.2 mm.

depressed-ovoid, 2–2.5 × 2.7–3.3 mm, pilose;

columella 1.6–2.1 mm.

white to light brown, oblong-ovoid, sharply angular in cross section, 1–1.2 × 0.6–0.9 mm, with 3–4 low, transverse ridges that cross angles.

gray to brown, ovoid, 1.5–1.7 × 1.2–1.3 mm, rugose with whitish ridges;

caruncle absent.

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

peduncle 0.1–0.6 mm.

in terminal dichasia (often weakly defined);

peduncle 1–2.7 mm, densely pilose.

= 28.