Stachys byzantina ( Big Ears )
Dense mat - forming perennial with orotund , lancet - shaped , medium light-green leaves with fuzzy , grayish - bloodless hair , to 10 inches long . Erect , short stalks bear spike of woolly purple flowers , 1/2 inch long . Excellent in a border with rose or perennials . Grown principally for foliation burden . Leaves become soggy and water - logged in excessive rain . demand well drained web site , prefering area slightly dry ....