self-fertilised. The plant blooms in May and June, and 

 some flowers may still be found even in July in the highest 

 Alpine pastures. It is met with widely distributed over 

 Central Europe, North America and Northern Asia, but is 

 absent in Scandinavia. On account of the numerous closely 

 allied species which are found in Northern Asia, it is thought 

 that this plant may have originated in that region and then 

 spread east and west to America and Europe respectively. 



