Xanthium abyssinicum Wallr. accepted as Xanthium strumarium L. (original description)
Xanthium antiquorum Wallr. accepted as Xanthium strumarium subsp. brasilicum (Vell.) O.Bolòs & Vigo (original description)
Xanthium armatum Humb. & Bonpl. ex Wallr. accepted as Xanthium spinosum L. (original description)
Xanthium brachyacanthum Wallr. (original description)
Xanthium brevirostre Wallr. accepted as Xanthium strumarium L. (original description)
Xanthium discolor Wallr. accepted as Xanthium strumarium L. (original description)
Xanthium eriocarpon Wallr. (original description)
Xanthium laevigatum Muhl. ex Wallr. (original description)
Xanthium longirostre Wallr. accepted as Xanthium strumarium L. (original description)
Xanthium oviforme Wallr. accepted as Xanthium strumarium L. (original description)
Xanthium pensylvanicum Wallr. accepted as Xanthium pungens Wallr. (original description)
Xanthium pungens Wallr. (original description)
Xanthium roxburghii Wallr. accepted as Xanthium strumarium L. (original description)
Xanthium saccharatum Wallr. accepted as Xanthium orientale subsp. italicum (Moretti) Greuter (original description)
Xanthium xanthocarpum Wallr. (original description)