Size and habit
Eucalypts vary in size and habit from shrubs to tall trees. Trees usually have a single main stem or trunk but many eucalypts are mallees that are multistemmed from … 展开

Although eucalypts must have been seen by the very early European explorers and collectors, no botanical collections of them are known to have been made until 1770 when Joseph … 展开

The oldest definitive Eucalyptus fossils are from Patagonia in South America, where eucalypts are no longer native, though they have been introduced from Australia. The fossils are from the early 展开

Most eucalypts are not tolerant of severe cold. Eucalypts do well in a range of climates but are usually damaged by anything beyond a light frost of −5 °C (23 °F); the hardiest are the snow gums, such as Eucalyptus pauciflora, which is capable of withstanding cold and … 展开

The genus Eucalyptus was first formally described in 1789 by Charles Louis L'Héritier de Brutelle who published the description in his book Sertum Anglicum, seu, Plantae rariores quae in hortis juxta Londinum along with a description of the type species, 展开

There are more than 700 species of Eucalyptus and most are native to Australia; a very small number are found in adjacent areas of 展开

Several eucalypt species are among the tallest trees in the world. Eucalyptus regnans, the Australian 'mountain ash', is the tallest of all flowering plants (angiosperms); today, the tallest measured specimen named Centurion is 100.5 m (330 ft) tall. 展开