Flora of North America species comparison

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

erect, usually branched near base, 6–22 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 absent;

blade linear to slightly lanceolate or linear-oblanceolate, 5–18 × 0.5–2.5 mm, base linear attenuate, margins entire, apex rounded to obtuse or acute, 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.

infundibular, 0.8–1.1 × 0.6–0.9 mm, glabrous;

glands 4, crescent-shaped; 0.2–0.4 × 0.5–0.6 mm;

horns divergent, 0.5–0.7 mm.

3–6.

5–10.

ovary densely crisped-villous;

styles 0.1 mm, 2-fid nearly entire length.

ovary glabrous;

styles 0.3–0.5 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, 1.8–2.2 × 3–3.2 mm, slightly 3-lobed;

cocci rounded, 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, ellipsoid, 1.4–1.7 × 1–1.3 mm, with deep, irregular to rounded, shallow to concave depressions over entire surface;

caruncle reniform-ovate, depressed-conic, 0.5–0.7 × 0.7–1 mm.

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

peduncle 1–2 mm.

peduncle 0–0.5 mm.

arrangement: terminal pleiochasial branches 3, 1–3 times 2-branched;

pleiochasial bracts similar in shape to but slightly shorter and wider than distal leaves;

dichasial bracts distinct, not imbricate, reniform-ovate to subdeltate-ovate or broadly ovate-lanceolate, base obliquely truncate to rounded, margins entire, apex obtuse to broadly acuminate;

axillary cymose branches 0–3.

= 18.