Flora of North America species comparison

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

decumbent to erect, 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.

green;

stipules lanceolate, 1 mm, margins dentate, apex acute;

petiole 1–3 mm;

blade oblong, 1.2–5 × 0.3–2 mm, base cuneate, apex acute to obtuse.

0–0.2 mm, erect.

0.1–23 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 4, equal, elliptic, 0.9–1.3 × 0.5–0.6 mm;

petals 4, pale purple, elliptic, 0.8–1 × 0.5 mm;

stamens 8;

styles 2.

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

depressed-ovoid, 4-locular, 1–1.1 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.

3 per locule, oblong to ellipsoid, straight or curved to 15°, 0.7–1 × 0.2–0.3 mm;

pits rectangular, length 1–3 times width, in 12 rows, 27–37 per row.