Flora of North America species comparison

erect, branched or simple, 2–30 cm.

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

alternate, erect, not distinctly petiolate, with clasping leaf sheaths;

blade linear, 2–60 × 1–4 mm.

alternate, not distinctly petiolate, with clasping leaf sheaths;

blade linear, 5–25 × 1–2 mm.

terminal, 1-bracteate;

bract linear to oblanceolate, to 20 × 2 mm.

axillary, 1-bracteate;

bract minute, scarious.

2–8;

sepals 3–7 mm;

petals 5, white, 4–6 mm;

stamens 3–5, anther yellow.

2–8;

sepals 1–2 mm;

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

stamens (2–)3(–5), anther pink.

1.2–2.6 mm, tuberculate;

elaiosome absent.

0.5–1 mm, tuberculate;

elaiosome minute, shorter than 0.5 mm.

= 28.