Eryngium alpinum (alpine eryngo ... Upright stems carry small, grey-blue, thistle-like flowers that sit on a broad, spiny ruff that adds enormously to their impact. ‘Picos Amethyst’ (15-18in ...

"Try a cultivated eryngium dynamite thistle instead; it has a similar color and texture without the pesky burrs," she says. Many people would say the tulip is their favorite flower; however ...