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.

erect, unbranched or branched, 30–85(–150) cm, pilose or glabrous.

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 0.1–0.3 mm;

petiole 0.2–3 mm, glabrous or minutely pilose;

blade broadly ovate to elliptic, 32–62(–82) × 18–28(–52) mm, base rounded to cuneate, margins entire, often white on distal leaves, apex acute, rarely mucronate, surfaces glabrous;

venation obscure, 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, 2.2–3.5 × 1.3–2.3 mm, margin between glands deeply divided into fringe of fimbriate lobes, pilose;

glands 4–5, green to greenish yellow, reniform to subcircular, 0.7–1.1 × 1–1.6 mm;

appendages white, orbiculate, 1.5–2.7 × 1.9–2.9(–3.6) mm, entire.

2–5.

30–70.

ovary sericeous;

styles 0.3–0.4 mm, 2-fid at apex.

ovary pilose;

styles 1–2.5 mm, 2-fid 1/2–2/3 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.

oblate, 3–5 × 3.5–7.5 mm, moderately to densely pilose;

columella 3–4.1 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.

orange-tan to gray, ovoid, 3.7–3.9 × 3–3.3 mm, rugose, with 2 transverse ridges (one dark orange to brown, other inconspicuous);

caruncle absent.

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

peduncle 0.1–0.6 mm.

in terminal pleiochasia, dichasial bracts narrowly elliptic to oblanceolate with conspicuous white margins;

peduncle 1.8–2.7(–22) mm, densely pilose.

= 28.

= 56.