What is the difference between a native English Blubell and a spanish one ?

Question

and how do Spanish bluebells alter forest ecosystems ?

Is the migration of Spanish bluebells natural and harmless or harmful ?

Answer 1

The English Bluebell, Hyacinthoides non-scripta, is a darker blue in color, has narrower leaves, has a sweeter scent, and droops more than the Spanish Bluebell, Hyacinthoides hispanica.

The migration of Spanish Bluebells from Spain to the UK is harmful. The Spanish Bluebell has become an invasive species in the UK because it is highly fertile and has nearly wiped out the English Bluebell.