The surface of the mud (24 or dust beds is coated with and protected by a continuous growth of moss (or lichen?). Bunch grass is abundant likewise over much of it, especially in shallow watercourses which have been carved into it. This bunch grass is particularly noticeable on the steep slopes of mud within the crater in its southwestern quarter. The grass grows even on the coarser ash where circumstances have favored the accumulation of any moisture. The eastern, northern and northwestern sides of the outer rim being covered with course ash and lapilli, are largely barren of vegetation, but here and there there is a tuft of bunch grass