The spread of species beyond their native habitat is a human-made environmental change on a global scale. Among vascular plants, over 16,000 species have now permanently settled in foreign countries.

Many non-native plants could survive in the Arctic, as rising temperatures and human activity make it easier for invasive plants to arrive.

Introduction: Nonnative species in the world / David Pimentel -- The impacts of alien plants in Australia / Richard H. Groves -- Environmental and economic costs of invertebrate invasions in Australia ...

ILLUSTRATIONS OF ALIEN PLANTS OF THE BRITISH ISLES : INCORPORATING ARTWORK ORIGINALLY PREPARED FOR D MCCLINTOCKS A NEW ILLUSTRATED BRITISH FLORA VOL 3 EJ CLEMENT DPJ SMITH IR THIRLWELL WITH DRAWINGS ...