Fruiting body a stalked sporangium, usually gregarious to crowded but occasionally scattered, 2–6 mm tall. Sporotheca ovate to cylindrical, pinkish red to brick-red but weathering to brown, 0.4–1.2 mm wide. Stalk slender, striate, the same colour as the sporotheca or darker, 0.5–1.5 mm long. Hypothallus either small and inconspicous under individual sporangia or contiguous for a group of sporangia, sometimes silvery but often not evident. Peridium persisting in mature fruiting bodies only as a shallow calyculus, the latter shining, plicate, smooth or nearly so. Capillitium consisting of a network of threads 3–4 µm in diameter and marked with cogs and half-rings, firmly attached to the whole inner surface of the calyculus. Spores red or reddish brown in mass, colourless by transmitted light, with a few scattered warts, 6–8 µm in diameter. Plasmodium white.