Robuta

https://www.rhs.org.uk/plants/131896/achillea-ptarmica-var-flore-pleno/details Achillea ptarmica var. flore-pleno | bachelor's buttons /RHS bachelor s buttons achillea ptarmica flore pleno var rhs https://www.rhs.org.uk/plants/62861/achillea-ptarmica-ballerina/details Achillea ptarmica 'Ballerina' | sneezewort 'Ballerina' /RHS achillea ptarmica ballerina sneezewort rhs