About a month ago, we drove down to the Warm River Spring and former fish hatchery site in Island Park. This is a favorite place for us, and I have been saddened to see noxious and obnoxious weeds such as spotted knapweed, hoary alyssum, yellow toadflax, plumeless and musk thistles, and common mullein, gaining ground each year in spite of efforts (mine and others) to control them. This trip, though, I noticed large patches of a perennial shrublike herbaceous plant (dies back to the ground each year) with yellow flowers. I had never noticed it there before, nor did I recognize it as a native. I did a little research and discovered that it is St. Johnswort, or St. John’s Wort, Hypericum perforatum, a native to Europe, Asia and Africa.