Galinsogea redirects here; for Galinsogea Kunth see Tridax.
Galinsoga is a genus of flowering plants in the family Asteraceae. It is native to North and South America and the West Indies, and naturalized in Europe, Asia, Africa, and Australia.
Galinsoga parviflora was brought from Peru to Kew Gardens in 1796, and later escaped to the wild in Britain. In Britain its name Galinsoga is sometimes popularly rendered as "gallant soldiers", and then sometimes altered to "soldiers of the Queen". In the United States it is called "hairy galinsoga".
Galinsoga quadriradiata (synonym G. ciliata) is also called "shaggy soldiers". It is very similar to Galinsoga parviflora but less hairy.
Annual herbs. Leaves opposite, simple. Capitula less than 1 cm across, radiate, heterogamous. Phyllaries in 2 series, largely herbaceous, the outer much shorter, the inner with membranous margins. Ray florets female, fertile; rays few (usually 5), white, 3-lobed; disk florets bisexual, fertile, orange-yellow. Receptacle conic, with scales. Achenes narrowly obovoid. Pappus of scales, with or without terminal awns.