Poronidulus conchifer (Schw.) Murr. Fruit body small cups 0.5-2cm wide; white, zoned grayish on inner surface. The cups first appear on the wood and then develop into shelf-like caps 1-5cm across, semicircular or kidney-shaped, sometimes with the small cups still adhering to them. Upper surface of cap whitish to grayish-white or yellowish, with concentric zones, particularly on the margin; smooth to minutely hairy or wrinkled. Tubes 1-2mm deep. Pores 2-4 per mm, angular; white to yellowish. Stem lateral, knoblike, or none. Flesh 0.5-1mm thick; white. Spores cylindrical, smooth, 5-7 x 1.5-2.5µ. Deposit white. Cup-shaped structure sterile. Habitat on dead elms and probably other deciduous wood. Found in central and eastern North America. Season June-November, fruit body overwinters. Not edible. Comment In the first stage of development this fungus can easily be misidentified as a cup fungus.