Flora of North America species comparison

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

erect, unbranched, 7–20 cm, glabrous.

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.

petiole 1–2 mm, reduced distally;

blade spatulate-cuneate, 8–10 × 4–5 mm (greatly reduced in size proximally), base cuneate, margins entire, apex rounded to emarginate or obcordate, surfaces glabrous;

venation pinnate.

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, 0.8–1.1 × 0.7–1 mm, glabrous;

glands 4, elliptic to trapezoidal, 0.3–0.6 × 0.6–1.2 mm;

horns divergent, 0.5–1 mm.

1–5.

10–15.

ovary glabrous;

styles 0.1–0.3 mm, 2-fid 1/2 length.

ovary smooth, glabrous;

styles 0.6–1 mm, 2-fid.

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

columella 1.3–1.5 mm.

depressed-globose, 1.8–2.2 × 2.2–2.9 mm, slightly lobed;

cocci rounded to slightly flattened, smooth, glabrous;

columella 1.5–1.8 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.

reddish brown to brown, often glaucous, oblong, 1.3–1.4 × 0.8–0.9 mm, abaxial faces with 15–20 shallow pits or almost smooth, adaxial faces with 4–6 large shallow pits or irregular oblong grooves;

caruncle conic, hat-shaped, 0.3–0.4 × 0.4–0.6 mm.

solitary or in small, cymose clusters at distal nodes;

peduncle 0.5–1.6 mm.

peduncle 0.2–0.6 mm.

arrangement: terminal pleiochasial branches 3, each 1–3(–4) times 2-branched;

pleiochasial bracts obovate, similar in size to distal leaves;

dichasial bracts distinct or basally subconnate, not imbricate, triangular-ovate, base truncate or cordate, margins entire, apex mucronate;

axillary cymose branches 1–4.

= 22.