A related pattern, the luminata, has the darker colors as a marbling between the veins, with a conspicuous light area around the hafts and the center of the flower. It is similar to the dwarf spot, but generally smaller, darker, and more sharply defined. It may have a velvety texture. Arils and arilbreds may also have veining and dotting all over the petals. In beardless irises, the term signal refers to a brightly colored streak located on the falls where bearded irises have a beard.
Some bearded irises show unusual petal-like projections at the ends of the beards.
Lloyd Austin, who promoted these irises in the 1950s and 1960s, dubbed them space-age irises. When the tip of the beard separates from the fall and comes to a point, it is called a horn. If the horn is extended into a bit of petal held out away from the fall, it is called a spoon. A large, ruffly, structure attached to the beard is called a flounce. The appearance of these appendages is somewhat variable.