Flora of North America species comparison

prostrate to decumbent, usually not mat-forming, 10–30 cm, crisped-villous to glabrate (proximally).

erect or ascending, decumbent and often branched near base, 10–40 cm, glabrous.

opposite;

stipules connate (lower side) or distinct (upper side), triangular-subulate, often lacerate distally, 0.5–1 mm, short crisped-villous to glabrate;

petiole 0.5–1.5 mm, usually short crisped-villous, sometimes wooly at distal nodes;

blade broadly elliptic to elliptic-oblong, ovate-spatulate, or ovate, 3–11(–15) × 3–6(–8) mm, base slightly asymmetric, rounded to slightly cordate and oblique, margins serrulate at least in distal 1/2, sometimes obscurely so, apex obtuse, abaxial surface finely crisped-villous, adaxial surface usually glabrous or glabrate, sometimes sparsely crisped-villous; 3-veined from base.

petiole usually 5–10 mm, 0–1 mm distally;

blade usually oblanceolate to obovate, rarely ovate, 5–30 × 3–10 mm, base broadly attenuate, margins entire, apex usually obtuse to rounded, occasionally slightly retuse, surfaces glabrous;

venation pinnate, midvein prominent.

obconic, 0.6–0.9 × 0.5 mm, crisped-villous or glabrous;

glands 4, reddish, oval to oblong, 0.1 × 0.1–0.2 mm;

appendages white to pink, rudimentary, 0–0.2 mm, distal margin entire or irregularly scalloped.

campanulate, 1.7–2.5 × 1.5–2.5 mm, glabrous;

glands 4, crescent-shaped; 0.6–1 × 0.8–1.5 mm;

horns divergent, 0.5–1.1 mm.

3–6.

9–15.

ovary densely crisped-villous;

styles 0.1 mm, 2-fid nearly entire length.

ovary glabrous;

styles 0.9–1.3 mm, 2-fid.

broadly ovoid, 1.2–2 × 1.4–1.5 mm, crisped-villous along keels and toward base, often glabrous between keels;

columella 1–1.2 mm.

ovoid-globose, 2.5–3.2 × 3 mm, slightly lobed;

cocci rounded to ± flattened, smooth, glabrous;

columella 1.5–2 mm.

white but with barely concealed brown surface beneath, ovoid, sharply 4-angled in cross section, abaxial faces plane to convex, adaxial faces concave, 0.8–1.1 × 0.5–0.7 mm, with several narrow, sharp, slightly irregular, transverse ridges.

white to gray, broadly oblong-elliptic to ovoid or nearly globose, 1.5–2 × 1.3–1.6 mm, strongly small-pitted;

caruncle irregularly winglike, conic, 0.6–1 × 0.7–0.9 mm.

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

peduncle 1–2 mm.

peduncle 0.5–1 mm.

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

pleiochasial bracts similar in shape and size to distal leaves;

dichasial bracts distinct to basally subconnate, not imbricate, widely ovate, rhombic, or reniform, base cordate, rarely slightly perfoliate, margins entire, apex obtuse to rounded, mucronulate;

axillary cymose branches 0–5.

= 18.