Wasatch Mountains, Utah, United States, has been shown to be a single clone connected by the root system. It is sometimes considered the world's largest organism by mass, covering , and also as among the world's oldest living organisms, at an estimated 14,000 years old. It is however possible that undiscovered clonal colonies of trees rival or exceed its size and/or age. Another possible candidate for oldest organism on earth is an underwater meadow of the marine plant Posidonia oceanica in the Mediterranean Sea, which could be up to 100,000 years of age. Examples When woody plants form clonal colonies, they often remain connected through the root system, sharing roots, water and mineral nutrients. A few non-vining, woody plants that form clonal colonies are Bigelow oak (Quercus sinuata var. breviloba), quaking aspen (Populus tremuloides), bayberry (Myrica pensylvanica), black locust (Robinia pseudoacacia), creosote bush (Larrea tridentata), bladdernut, blueberry (Vaccinium), devil's club (Oplopanax horridus), forsythia, hazelnut (Corylus), honey locust (Gleditsia triacanthos), Kentucky coffeetree (Gymnocladus dioicus), kerria (Kerria japonica), pawpaw (Asimina triloba), poplars (Populus), sassafras (Sassafras albidum), sumac (Rhus), sweetgum (Liquidambar styraciflua), and sweetshrub (Calycanthus floridus). See also King Clone Tumour heterogeneity References Further reading Kricher, J. C., & Morrison, G. (1988). A Field Guide to Eastern Forests, pp. 19–20. Peterson Field Guide Series. . Plant reproduction Plant morphology Mycology