This eucalyptus stands on the grounds of a fort built to defend Rome, and it only joined the national monumental-tree register in late 2025, one of 211 trees added nationwide in a single update.
Tasmanian Blue Gum
A trunk 5.2 metres around on a tree planted in 1904 is what a blue gum does when nothing gets in its way. This page maps every tasmanian blue gum on the site, 6 so far across 6 cities.
Eucalyptus globulus comes from Tasmania and southeastern Australia and puts on size faster than almost anything else that grows this big, which is why nineteenth century Europe planted it everywhere: for timber, for drying out marshland, and on the belief that its oils cleaned bad air. The tree on the hotel road at Bucaco is 7.15 metres around at about 150 years old, thicker than anything else on that walk. Naples' reaches 30 metres, the tallest tree the registers record inside the botanical garden. Madrid's stands north of the Estanque in the Retiro and is over a century old. Four are mapped, and every one of them is younger than it looks.
Rome
Barcelona
A trunk 5.2 metres round on a tree planted in 1904 tells you what a blue gum does when nothing stops it.
Madrid
In February 2015 the Comunidad de Madrid revised its register of singular trees and published two lists side by side.
Naples
Thirty metres, which makes this the tallest tree the registers record inside the garden, and the reason it stands here at all is a nineteenth century medical theory that turned out to be wrong.
Guimaraes
Seven metres and five centimetres round at chest height, thirty-nine metres tall, a crown that spreads twenty-nine metres wide: the giant eucalyptus of Monte da Penha is built at a scale that makes...
Bucaco
Seven metres and fifteen centimetres around the trunk, which is more than any other tree on this page and more than most trees in Portugal.
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