Valerian

A lot of wildflowers and garden escapees around the island, blooming away in fine form: valerian, snow-in-summer, Solomon's Seal, sea campion, gorse, wallflower, ivy-leaved toadflax etc etc.
The geology is quite interesting, too... basically basalt but with strange inclusions, possibly water-worn rocks and pebbles fallen into joints in the rock and concreted into place to form a conglomerate over time? Just guessing...