Brian Borrello knows the power of carbon. The Portland, Ore.–based artist makes unusual use of carbon-based drawing materials to create botanical renderings, which in his show “Dark Matter” are exhibited alongside sculptural replicas of moss and fungi. The two-dimensional works mix charcoal and india ink with a carbon-based medium seldom seen in art: motor oil. From these, he creates biomorphic images—leaves, roots, and spores—that might represent the materials’ past lives. Each figure bleeds into its background, giving it the look of a precisely executed abstraction. Of course, they’re all as life-like as figures can get. At Jonathan Ferrara Gallery, 400a Julia St., New Orleans, (504) 522-5471. Prices range from $500 to $10,000.