Aaron Volkening:
Cup plant (Silphium perfoliatum), Wisconsin
Aaron Volkening:
Cup plant (Silphium perfoliatum), Wisconsin
Aaron Volkening:
Cup plant (Silphium perfoliatum), Wisconsin
Aaron Volkening:
Water trapped in "cup" of cup plant
Aaron Volkening:
Prairie dock (Silphium terebinthinaceum), Holler Park
Aaron Volkening:
Prairie dock (Silphium terebinthinaceum), Holler Park
Aaron Volkening:
Prairie dock (Silphium terebinthinaceum), Holler Park
Aaron Volkening:
Prairie dock (Silphium terebinthinaceum), Holler Park