South American burr (Xanthium cavanillesii)

A comparison of Xanthium burrs, from left to right: Bathurst burr, Noogoora burr, Californian burr, Italian cockleburr and South American burr.

Caption: A comparison of Xanthium burrs, from left to right: Bathurst burr, Noogoora burr, Californian burr, Italian cockleburr and South American burr.

Photographer: B.A. Auld & R.W. Medd NSW DPI

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