
Ambrosia artemisiifolia	Artemisia vulgaris	Tanacetum vulgare

leaves concolorous, (double) pinnapartite, 1^st order leaflets remotely lobed	leaves discolorous, underneath white	leaves concolorous, pinnapartite, 1^st order leaflets strongly serrate

stem hairy	stem almost glabrous	stem glabrous

inflorescence spike-like, erect and leafless, involucre more obvious than flowers	inflorescence spike-like, leafy, involucre more obvious than flowers	inflorescence corymbose, flowers obvious and yellow