Blue Porterweed, Stachytarpheta urticifolia, With Piles of “Dirt” Along Stems

These piles of dirt are accumulated frass and silk webbing from a caterpillar, [Pyralidae: Penthesilea difficilis], tunneling inside the stem (photo with flower and frass by Stephen Brown, UF|IFAS Extension Lee Co.)There isn't too much one ... READ MORE