Robuta

https://www.rhs.org.uk/plants/271118/eryngium-green-jade/details Eryngium 'Green Jade' | eryngo 'Green Jade' /RHS green jade eryngium eryngo rhs https://www.rhs.org.uk/plants/201744/eryngium-pandanifolium-physic-purple/details Eryngium pandanifolium 'Physic Purple' | eryngo 'Physic Purple' Herbaceous Perennial/RHS eryngium pandanifolium herbaceous perennial physic purple eryngo https://www.rhs.org.uk/plants/249929/eryngium-planum-blue-glitter/details Eryngium planum 'Blue Glitter' | blue eryngo 'Blue Glitter' Herbaceous Perennial/RHS eryngium planum blue glitter herbaceous perennial eryngo rhs https://www.fws.gov/rivers/species/button-eryngo-eryngium-yuccifolium-var-yuccifolium Button Eryngo (Eryngium yuccifolium var. yuccifolium) | U.S. Fish & Wildlife Service button eryngo eryngium yuccifolium var fish wildlife https://www.fws.gov/species/eryngo-eryngium/map Eryngo (Eryngium) | Map | U.S. Fish & Wildlife Service | FWS.gov u s fish wildlife service eryngo eryngium map fws https://www.rhs.org.uk/plants/6778/eryngium-alpinum/details Eryngium alpinum | alpine eryngo Herbaceous Perennial/RHS eryngium alpinum herbaceous perennial alpine eryngo rhs