Flora of North America species comparison

prostrate, loosely mat-forming, 5–40 cm, glabrous, sometimes slightly glaucous.

erect or ascending, branched, 30–80(–110) cm, strigillose or glabrescent, sharply angled.

opposite;

stipules usually distinct, linear-subulate, usually irregularly fringed or lobed, rarely laciniate, 0.4–2 mm, glabrous;

petiole 0.2–2 mm, glabrous;

blade narrowly oblong to oblong-obovate or oblong-ovate, 3–15 × 2–7 mm, base asymmetric, one side angled and other rounded to shallowly cordate, margins minutely sparsely serrulate, especially near apex and on longer side, apex rounded to obtuse, abaxial surface usually pale grayish green, adaxial surface sometimes reddish tinged or with reddish blotch, both surfaces glabrous; palmately veined at base, pinnate distally.

usually alternate, sometimes some opposite;

stipules usually 0.2–0.5 mm, rarely rudimentary;

petiole 0.4–5.9 mm, strigillose;

blade ovate, elliptic, linear-elliptic, or oblong, 10–83 × 3–39 mm, base attenuate, rounded, or cuneate, margins entire, apex acute or obtuse, surfaces strigillose;

venation occasionally obscure on narrow leaves, midvein conspicuous.

obconic, 0.6–0.9 × 0.3–0.6 mm, glabrous;

glands 4, red to purple, narrowly oblong-elliptic, 0.1–0.2 × 0.1–0.5 mm;

appendages white or pinkish tinged, semilunate and fringing distal margin of gland, 0.1–0.3 × 0.1–0.3 mm, distal margin usually irregularly crenulate or lobed.

campanulate or obconic, 1–1.8 × 0.8–1.7 mm, glabrous or strigillose toward rim;

glands (1–)2–4, yellow to greenish, elliptic or oblong, 0.1–0.3 × 0.2–0.4 mm;

appendages white to tinged purple, ovate and often hoodlike or forming narrow rim around distal margin of gland, 0.3–1.6 × 0.4–0.9 mm, entire.

1–5.

30–40.

ovary glabrous;

styles 0.1–0.3 mm, 2-fid 1/2 length.

ovary glabrous;

styles 0.7–1 mm, 2-fid from 1/2 to nearly entire length.

broadly ovoid, 1.3–1.9 × 1.6–2 mm, glabrous;

columella 1.3–1.5 mm.

ovoid-oblate, 2.5–3 × 3–3.5 mm, glabrous;

columella 1.6–1.9 mm.

with thin white coat that readily falls off, surface below tan brown, oblong-ovoid, sharply angular in cross section, 1–1.4 × 0.6–0.9 mm, with 3–4(–6) prominent transverse ridges that usually interrupt abaxial keel.

gray, brown, or nearly black, ovoid, circular or weakly angled in cross section, 1.5–1.7 × 1.3–1.5 mm, coarsely tuberculate with longitudinal rows of shallow pits;

caruncle absent or punctiform, 0.1–0.2 mm.

solitary or in small, cymose clusters at distal nodes;

peduncle 0.5–1.6 mm.

in usually terminal, rarely axillary, dichasia, distal dichasial bracts often white;

peduncle 0.4–4.5 mm (to 15 mm at first node of inflorescence), glabrous.

= 22.