Xanthium strumarium L. (Nappola minore)
Habit at LaPerouse, Maui - Credit: Forest and Kim Starr - Plants of Hawaii - Image licensed under a Creative Commons Attribution 3.0 License, permitting sharing and adaptation with attribution.

Xanthium strumarium L. (Nappola minore)
Dipartimento di Scienze della Vita, Università di Trieste - Progetto Dryades - Picture by Andrea Moro - Image licensed under a Creative Commons Attribution Non Commercial Share-Alike 3.0 License

Xanthium strumarium L. (Nappola minore)
Walter Hood Fitch - Illustrations of the British Flora (1924) - Permission granted to use under GFDL by Kurt Stueber. Source: www.biolib.de - Permission is granted to copy, distribute and/or modify this image under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".

Xanthium strumarium L. (Nappola minore)
USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 3: 346.

Xanthium strumarium L. (Nappola minore)
View wetland at Kanaha Beach, Maui - Credit: Forest and Kim Starr - Plants of Hawaii - Image licensed under a Creative Commons Attribution 3.0 License, permitting sharing and adaptation with attribution.

Xanthium strumarium L. (Nappola minore)
Steve Hurst - USDA-NRCS PLANTS Database - Not copyrighted image

Xanthium strumarium L. (Nappola minore)
Picture by Pancrazio Campagna

Xanthium strumarium L. (Nappola minore)
Picture by Pancrazio Campagna

Xanthium strumarium L. (Nappola minore)
USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 3: 345.

Xanthium strumarium L. (Nappola minore)
View wetland at Kanaha Beach, Maui - Credit: Forest and Kim Starr - Plants of Hawaii - Image licensed under a Creative Commons Attribution 3.0 License, permitting sharing and adaptation with attribution.