The following are generally confined to the valleys or level parts of Hill Gardens:�Chrysanthemums, Asters, Peonies, Petasites japonicus, Bletia hyacinthina, Funkia ovata, and Manettia cordifolia. For well-sides, Pines, Plum trees, Willows, or Bamboos are considered suitable, but not in too great numbers. The roots of the Willow are apt to push out the stones of a rubble-lined well, if planted too near. Plants infested by noisome insects and all poisonous growths must on no account be placed near wells or water-basins.