Flora of North America species comparison

erect, aerial portion 2–32 cm, subterranean portion 1–15 cm.

decumbent, freely branching or simple, 1–10 cm, often rooting at nodes, forming small, loose mats.

opposite, petiolate;

blade oblanceolate to rhombic or ovate, short, 2–60 × 1–20 mm.

alternate, not distinctly petiolate, with clasping leaf sheaths;

blade linear, 5–25 × 1–2 mm.

ebracteate.

axillary, 1-bracteate;

bract minute, scarious.

2–10, often replaced by bulbils;

sepals 2–4 mm;

petals 5, white or pink, 2–4 mm;

stamens 5, anther pink or lavender.

2–8;

sepals 1–2 mm;

petals 2–5, often absent, white, 0.7–1.5 mm;

stamens (2–)3(–5), anther pink.

1–1.5 mm, tuberculate;

elaiosome present.

0.5–1 mm, tuberculate;

elaiosome minute, shorter than 0.5 mm.

= 22.