“Hypothetically Micro” confronts us with a dozen bold ribbon-like entities placed against flat backgrounds of solid color. Familiar on the surface, they become increasingly difficult to place, particularly in terms of scale. Velitchkova’s lyrical specimens are artfully cropped in a way that suggests we may be looking at the tail, wing, fin, or frond of a much larger organism. Yet something about the color palette also recalls the dyes used in microscopy: These forms could just as easily be microorganisms as much larger birdlike or fishlike creatures. Her work shines next to other generative artists for its elegant biomorphic forms and subtle exploration of color. Velitchkova is a magnificent...