They are always around us, but rarely noticed. On a gray day towards the end of winter, a shady wall is more colorful that anything in the garden it protects. The textures are enough to make me linger---velvety moss outlining each rough brick and pale lichens doing their very best impression of peeling paint. Look closely at that almost-florescent yellow lichen. It has crept along and dusted the moss with yellow, like the aftermath of a busy honeybee spreading grains of pollen out over the petals of a flower. Such marvels of nature, right there on a brick wall.