With the permanent changes imposed on Tasmania by this new foreign flora, came the beginnings of a parallel change in Europe and other continents.
Tasmanian plant consignments had become two way traffic by the 1820's, as the strange new plants from the antipodes progressively disseminated throughout the international horticultural establishment.
Records revealed that the endemic Tasmanian "Silver Peppermint" Eucalyptus pulchella was flourishing as forest stands around Naples, Italy. In fact it was formally named as Eucalyptus linearis in1832 from specimens collected here. However, it was later correlated with a specimen collected in 1829, from the slopes of Mt. Wellington.
Many early exchanged specimens of Tasmanian flora have become notorious international weed problems. Good examples include "Tasmanian Blue Gum" Eucalyptus globulus whose seeds were received in Paris in 1804 and French parks were proudly displaying their seedlings by 1810.
The American gold diggers returning to California after the Australian gold rush in the1850's introduced Blue Gum to their State. It is now a prolific weed known as the Californian Blue Gum.
Von Mueller the doyen of eucalyptologists, enthusiastically distributed the seed of various Tasmanian gum trees around the world immediately on his arrival in Tasmania in the late 1840's.