Feddes Repert. 70: 4. 1965.
Herbs, 0.2-2.5dm, sparsely to densely pubescent with falcate and straight hairs. Stems rooting at nodes. Leaf blades 3-8 × 2-4mm, base prominently oblique. Achenes light brown, shiny, symmetric, 0.8-0.9 × 0.6mm, hard.
Phenology: Flowering late winter–spring.
Habitat: Weed in lawns and gardens, waste places, shaded banks, sidewalks
Introduced; Calif., Mexico (Baja California), Europe.