Eryngium planum Blue Hobbit Sea Holly – PlantsInTheCity
High Country Gardens - A gorgeous patio planting featuring Sea Holly (Eryngium planum Blue Glitter) https://www.highcountrygardens.com/perennial-plants/unique-plants/eryngium- planum-blue-glitter | Facebook
Eryngium planum Blue Cap Sea Holly – PlantsInTheCity
Eryngium planum (Blue Eryngo, Blue Sea Holly, Flat Sea Holly, Sea Holly, Sea Star Thistle, Star Thistle) | North Carolina Extension Gardener Plant Toolbox