Fruiting body a pseudoaethalium, consisting of partially merged sporangia; sporangia sessile or almost sessile, cylindrical, with hollow, rarely flat, horny, regular or irregular columellae, which are sometimes absent. Peridium fugacious but usually leaving behind some plate-like fragments, which may be connected to the capillitium or hang free. Columella usually dark, branched and/or reticulate, often with axillary membranes with bulbous expansions, with a surface net, the latter sometimes scanty, usually looped and/or without free ends on the surface. Spores dark in mass.
Five species have been described for this genus (Lado 2001), and two of these have been recorded from New Zealand.