Flora of North America species comparison

decumbent to erect, branched.

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

light green to green, sometimes becoming reddish in terrestrial plants;

stipules lanceolate, 0.5–0.6 mm, margins dentate, apex acute;

petiole 1–4 mm;

blade obovate to oblanceolate, 4–12(–15) × 1.2–3 mm, base narrowly cuneate, apex acute to obtuse.

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.

1.5–2.5(–3.5) mm, recurved in fruit.

0–0.2 mm, erect.

sepals 4, usually equal, sometimes 1 reduced, oblong-ovate or widely lanceolate, 0.5–0.6 × 0.3–0.4 mm;

petals 4, greenish white, slightly reddish, or pink, elliptic or ovate, 1–1.5 × 0.5–0.6 mm;

stamens 8;

styles 4.

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.

depressed-ovoid, 4-locular, 1.3–2.5 mm diam.

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

2–5 per locule, oblong to ellipsoid, curved 90–180°, 0.6–1 × 0.2 mm;

pits elliptic, length 1–3 times width, in 6–10 rows, (16–)20–29 per row.

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.