Orange sporophores, or telial cushions (fungal fruiting bodies), of incense cedar rust, Gymnosporangium libocedri, on the underside of incense cedar leaflets.

Orange, round, raised fruiting bodies of incense cedar rust shown close-up. Credit: R. F. Scharpf, USDA Forest Service, Bugwood.org
Credit: R. F. Scharpf, USDA Forest Service, Bugwood.org