• Xanthium acerosum Greene
• Xanthium californicum Greene
• Xanthium californicum Greene var. rotundifolium Widder
• Xanthium campestre Greene
• Xanthium canadense Mill.
• Xanthium cavanillesii Schouw
• Xanthium cenchroides Millsp. & Sherff
• Xanthium commune Britton
• Xanthium echinatum Murray
• Xanthium glanduliferum Greene
• Xanthium italicum Moretti
• Xanthium macounii Britton
• Xanthium oligacanthum Piper
• Xanthium oviforme Wallr.
• Xanthium pensylvanicum Wallr.
• Xanthium saccharatum Wallr.
• Xanthium speciosum Kearney
• Xanthium strumarium L. subsp. italicum
• Xanthium strumarium L. var. oviforme (Wallr.) M.Peck
• Xanthium strumarium L. var. pensylvanicum (Wallr.) M.Peck
• Xanthium varians Greene

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