• Widespread. Asia, Africa, North, South and Central America, Oceania. In Australia, Fiji, PNG.
• Invasive, long-lived, much-branching, creeping weed of plantations, orchards, vegetable fields, wet pastures, field borders, roadsides, gardens and wasteland. Mainly problem in open, moist habitats with disturbed soils, and young crops. Withstands temporary flooding.  
• Soft, smooth, fleshy stems, up to 100 cm long, enclosed by sheath at base. Leaves, 4-6 cm long, alternate along stems, with hairs on margins. Flowers, small clusters in upper leaf forks, three bright blue petals, opening in morning. Seeds, dark-brown. Roots from nodes along stems.
• Spread: vegetative propagation; seeds; stem pieces; water; soil; as a medicinal plant and ornamental.
• Biosecurity: moderately high risk of introduction; used as an ornamental. Available on internet.
• Biocontrol: Little known.
• Cultural control: hand weed or hoe (but stem pieces regrow); cultivation (mechanical or animal drawn); cover crops; increase crop density.
• Chemical control: in Australia: bentazone; glyphosate; fluroxypyr; pendimethalin. In Fiji, metsulfuron-methyl.

Commelina; it is also known as wandering Jew, baby dayflower, or scurvy weed. CABI prefers the name spreading dayflower.

Commelina diffusa. It has also been known as Commelina nidiflora and Commelina communis.  It is similar to another plant also called wandering Jew, Commelina benghalensis. It is a member of the Commelinaceae.