|Scientific name:||Ambrosia tenuifolia Sprengel|
Subhumid temperate regions, principally on lighter soils in open areas, occurring as a weed of roadsides, railway reserves, sand dunes, cultivated fields, stubble paddocks, degraded pastures and waste places. Native to North America. Now found in North and Central Coasts, and Central Tablelands and South Western Slopes of NSW. Also found in Melbourne and Adelaide areas (Parsons & Cuthbertson 2001).