Shortly after posting the item on an amazing tree that clings to life from the cliffs at Pictured Rocks National Lakeshore in Michigan, I got to thinking about another aspect of persistent plants: the invasives. These, too, find homes on the sandstone cliffs off of the south shore of Lake Superior — and once they’re established they don’t want to go away.
While visiting Miner’s Castle (photo below), we admired the pretty forget-me-nots (Myosotis spp.), blanketing the forest floor nearby. It turns out these are not natives to the area, but a very aggressive plant that is displacing trout lilies and other plants of the region. Since this is a rare ecosystem, the National Parks Service is taking some steps to remove (or at least reduce) the forget-me-nots and other invasives such as garlic mustard and spotted knapweed from the area. We also saw what I think is Clintonia borealis (yellow corn lily), which is native to the Upper Penninsula.