Ageratum conyzoides seeds grow into the billy goat weed or goat weed — an annual or subshrubby herb native to the seasonally dry tropical biome of Mexico and Central America, now established as one of the world's most widely naturalised and invasive plants, present in virtually every tropical and subtropical country from Africa to Asia. Described by Linnaeus. The epithet conyzoides means 'resembling Conyza'. A significant weed of agricultural fields, roadsides, grasslands and disturbed ground worldwide. Despite its invasive status, one of the most medicinally important tropical plants — widely used in traditional medicine across Africa, Asia and the Americas for wounds, fever, inflammation, respiratory infections, gastrointestinal disorders, headache and many other conditions. Scientific research confirms analgesic, anti-inflammatory, antimicrobial, antidiarrheal and antipyretic properties. Produces clusters of small fluffy blue-purple flowers. Family Asteraceae, tribe Eupatorieae.Full sun; adaptable to most soils; warm tropical to subtropical conditions; annual — prolific self-seeder. Check local invasive status before planting. 'Conyzoides' = resembling Conyza; Linnaeus; billy goat weed; invasive in pantropical agricultural systems Traditional medicine: wounds, fever, inflammation, respiratory — confirmed analgesic, antimicrobial properties Mexico — seasonally dry tropical biome; naturalised pantropically (Africa, Asia, Americas) Genus Ageratum ~40 species; Family Asteraceae (tribe Eupatorieae) Full sun; adaptable soils; warm tropical; annual self-seeder; check invasive; Family Asteraceae Ageratum conyzoides is billy goat weed — one of the most paradoxical plants in tropical agriculture: simultaneously one of the most serious invasive agricultural weeds in the tropics and one of the most medicinally important herbs across three continents, its fluffy blue-purple flowers concealing a pharmacological richness documented across African, Asian and American traditional medicine systems. IMPORTANT: Pictures show the adult plant, which is not for sale. The offer is only for seeds.