Genus epithet ‘Bidens’ (BY-dens) means ‘twice’ (bi) and ‘toothed’ (dens), a reference to the two bristles on the tip of the achene-seed (1) of some members of this genus. Species epithet ‘pilosa’ means ‘hairy’, describing the velvety foliage. achene – a small, dry one-seeded fruit that does not open to release the seed. Synonyms: Bidens abadiae DC; Bidens abadiae var. Sherff pilosoides ; Bidens arenaria … Continue reading Aceitilla : Bidens pilosa