Even environmentally conscious hikers are neglecting to clean their boots before heading for the mountains and thus may be introducing alien plants to the environment, according to a survey. “Visitors ...

There are approximately 27 000 indigenous species in South Africa and 9 000 foreign plant species that have been introduced over the past few centuries. Of these 9 000 exotic or alien introductions, ...

The beauty of the pink and purple carpets of digitalis flowers increasingly seen on hillsides in Japan conceals a potential menace to ecosystems and even human health. The flowers, which blossom in ...