Plant I'd from Polesden Lacey

Frozz

HHi went to Polesden Lacey and saw a plant I would like, but unsure of it's name

here is the pic

 

 

Any thoughts to its name?

 

thanks

nutcutlet

it's a paeony. don't know which one. herbaceous, not a tree paeony

Frozz

great, many thanks