The artwork will be permanently sited in the historic Royal Fort Gardens in Bristol. It's the result of three years' work by artist Katie Paterson, in collaboration with architects Zeller & Moye.
Hollow was commissioned to mark the opening of the University's £56.5million Life Sciences building and is produced by Bristol-based public art producers, Situations.
From the oldest tree in the world to some of the youngest and near-extinct species, the tree samples contain within them stories of the planet's history and evolution through time.
Spanning millions of years, Hollow is a miniature forest of all the world's forests, telling the history of the planet through the immensity of tree specimens in microcosm.
Katie Paterson said: "Some samples are incredibly rare – fossils of unfathomable age, and fantastical trees such as Cedar of Lebanon, the Phoenix Palm, and the Methuselah tree thought to be one of the oldest trees in the World at 4847 years of age, as well as a railroad tie taken from the Panama Canal Railway, which claimed the lives of between 5,000 to 10,000 workers over its 50 year construction and wood is salvaged from the remnants of the iconic Atlantic city boardwalk devastated by hurricane Sandy in 2012."
Over 10,000 unique tree species have been gathered from across the planet, from Yakushima, Japan to the White Mountains of California, with generous donations from the Herbario Nacional de México, Kew Gardens, Kyoto University, the Arnold Arboretum at Harvard and many more.
Professor Guy Orpen, Deputy Vice-Chancellor of the University of Bristol and Chair of its Public Arts Committee, said: "We’re very excited to see Hollow in situ at Royal Fort Gardens and have no doubt that it will be a magnificent piece of public art for people across Bristol and beyond to explore and enjoy. It's quite amazing to think that trees of all ages, from so many different families and from all corners of the earth, will be represented.
"It’s certainly a captivating way to celebrate the important work taking place in our world-leading Life Sciences building, where our researchers are studying many of the acute challenges which face humanity this century – such as food security, biodiversity loss and climate change. Hollow allows us to connect in new and previously unimagined ways with the beauty, complexity and depth of the natural world."