Whorled Rosinweed (Silphium trifoliatum) are in bloom right now, and through the fall, along trails up here in the mountains of the Blue Ridge. An herbaceous perennial native to eastern North America. Whorled Rosinweed grows to 3-5′, or on occasion up to 10′ tall. It’s unbranched, except where the flowers appear. Occasionally there are side…