Eryngium proteiflorum, Mexican Sea Holly
Here's a rarely available and truly stunning architectural being that you want to plant now and not handle again for a while! Edged with jagged prickles, the leaves grow into a magnificent clump, from which rise stout stems carrying silvery-greenish-white flowers reminiscent of Protea flowers, each nestled in a collar of bracts in luminous steely blues and greens. Perfect for hot, dry sites with good drainage, and would make a dramatic pot plant. The flowers, if you can bear to pick them, are supposedly fabulous for flower arrangements. Flowering height at maturity 60-90cm, clump 40-60cm across. 9cm pot.