The European beech tree at Dunedin Botanic Garden has a burr about 1m in diameter. PHOTO: LINDA ROBERTSON

Do you have a tree in your garden with a large knobbly lump? It’s probably a burr.The European beech tree at Dunedin Botanic Garden has a burr about 1m in diameter. PHOTO: LINDA ROBERTSON

Do you have a tree in your garden with a large knobbly lump? It’s probably a burr. …Read More

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