appearance assorted assortment bark bonsai controlled foliage form formed garden gnarled gray green greenery grey grown growth leaves miniature miniatures old plants pots potted potted-plants pruned reduced Roots shape shaped shapes small textured textures trees trimmed trunks variations variety abstract appearances arid background Cacti cactus clumps clusters coloring colors colouring colours display edge edges flora garden-display garden-plants irregular light ornamental perennials pointed succulents sunlight surface surfaces unusual various protection sharp yellow curling curly