Flora of North America species comparison

flattened or elliptic, 0.3–1.1 mm diam.

prostrate, elongate, root cap asymmetric.

1.8–9 mm apart, 0.4–300 × 0.5–1.5 mm at base.

often trailing in connate basally;

stamens [1–]2[–many], [1–2-whorled or incompletely 1-whorled] restricted to 1 side of flower;

filaments arising from andropodium [individually, not from andropodium], distinct or connate basally;

ovary 2[or 3]-carpellate;

stigmas 2[or 3], apical.

stipules caducous (absent from leaves 3–9 nodes back from stem apex), 0.5–3.6 mm, margins entire;

petiole arising perpendicular to stem axis or upright, 0.4–59 mm;

blade 1–13 times dichotomously divided, 1.7–142 mm, ultimate divisions flattened, spatulate, linear, or awl-shaped, 0.2–40 × 0.05–0.8 mm, central vein faint or absent.

spathella 1.5–6.2 × 0.8–1.8 mm.

0.4–2.9 mm, to 0.6–10.5 mm in anthesis, 0.5–9 mm in fruit.

tepals linear or awl-shaped, apex acute, lateral tepals 0.7–2 mm, andropodial tepals 0.1–1.1 mm;

andropodium 0.1–3.3 mm, 0.7–4.3 mm in anthesis;

filaments 0.2–0.9 mm, 0.3–2 mm in anthesis;

anthers 0.5–1.5 × 0.4–0.8 mm;

ovary 0.7–2.6 × 0.4–1.4 mm;

stigmas 0.3–1.4 mm, 0.4–1.5 mm in anthesis.

capsular, 2-valved [3-valved in Tristicha], [valves persistent] 1 valve falling away after dehiscence.

1.4–3.1 × 0.7–1.7 mm.

0.4–0.8 × 0.5–0.8 mm.

0–40[–numerous] per capsule, orange-brown, minute, ovoid, outer integument expanded and sticky when wet.