General: Annual (occasionally biennial) herb from a taproot; stems prostrate to ascending, several, branched, round in cross-section, grooved, 10-30 (50) cm tall/long.
Leaves: Basal leaves lacking; stem leaves alternate, oblong or egg-shaped, usually overlapping but not crowded, the blades 1.5-3 cm long, somewhat reduced upward, the stalks short to long, jointed at the base; stipules ragged, 3-6 mm long.
Flowers: Inflorescence of few to several flowers in axillary clusters; perianths about 3-4.5 mm long, greenish with pink margins, 5-lobed about 2/3 the distance to the base.
Fruits: Achenes, 3-angled, olive-green to yellowish-brown, lance-egg-shaped, nearly smooth, usually shiny, usually exserted 1-3 mm.
If more than one illustration is
available for a species (e.g., separate illustrations were provided for two
subspecies) then links to the separate images will be provided below.
Note that individual subspecies or varietal illustrations are not always available.
