Flora of North America species comparison

erect or ascending, usually unbranched, sometimes 1–2 branched.

prostrate, highly branched.

green;

stipules lanceolate, 0.2 mm, margins entire, apex rounded;

petiole 0–1 mm;

blade elliptic to oblanceolate or spatulate, 0.3–5(–11) × 0.7–1.8(–4) mm, base rounded to truncate, apex obtuse-acute.

light green to green;

stipules triangular or ovate-lanceolate, 0.7–1 mm, margins dentate, apex acute or obtuse;

petiole 0–3 mm;

blade linear, lanceolate, or narrowly oblong, 3–10 × 1.5–3.5 mm, base attenuate, apex acute or obtuse.

0–0.2 mm, erect.

0.3–0.4 mm, erect.

cleistogamous when submersed;

sepals 2, equal, ovate to oblong, 0.5 × 0.3 mm;

petals 2, reddish, long-elliptic, elliptic, or ovate, 1–1.5 × 0.5 mm;

stamens 2;

styles 2.

sepals (2–)3(–4), usually 1 reduced, ovate, 0.5(–0.7) × 0.2–0.4 mm;

petals 3, white or reddish, widely ovate or elliptic, 0.6–1.2 × 0.5 mm;

stamens 3;

styles 3.

oblong-ovoid, 2-locular, 0.9–1.5 mm diam.

compressed-globose, 3-locular, 1.2–1.7[–2] mm diam.

4–9 per locule, thickly cylindric to barrel-shaped, straight, 0.4–0.5(–0.7) × 0.2(–0.3) mm;

pits elliptic, length 1.2–1.6 times width, in 8–9 rows, (11–)15–20 per row.

10–25 per locule, oblong, straight or slightly curved, 0.4–0.5 × 0.1–0.2 mm;

pits angular-hexagonal, length 2–3 times width, in 6–8 rows, 16–25 per row.

= ca. 40.