Xanthium Linnaeus. Cocklebur.
A genus of about 3-20 or more species, herbs, cosmopolitan (of somewhat uncertain original distribution). A very broad approach to species delineation has been fashionable (see synonymy); we are convinced that the delineation of more taxa (but not an inordinate number) is warranted and does a better job of representing the diversity within the genus.
Key advice:Mature burs are needed for the identification of most species.
Ref: Cronquist (1980); Fernald (1946); Löve & Dansereau (1959); Millspaugh & Sherff (1919); Strother (2006ee) In Flora of North America Editorial Committee (2006b); Tomasello (2018). Show full citations.
Hover over a shape, letter, icon, or arrow on the map for definition or see the legend. Data for arrows not developed for genera and families which may have species only occurring outside the flora area.
© Gary P. Fleming | Xanthium strumarium | Original Image ⭷
© J.W. Hardin | Xanthium strumarium | Original Image ⭷
© Bruce A. Sorrie | Xanthium strumarium | Original Image ⭷Feedback
See something wrong or missing on about Xanthium? Let us know here: (Please include your name and email if at all complicated so we can clarify if needed.) We greatly appreciate feedback, and will include updates from you in our next webapp update, which can take a few months.
Cite as...