SPANISH HYPHOMYCETES .15. THE AERO-AQUATIC GENUS HELICODENDRON

Six aero-aquatic species of Helicodendron Peyronel were isolated from a variety of submerged decaying leaves and twigs of deciduous and coni ferous plants collected from several ponds and streams in North Catalo nia, Spain. These are H. articulatum Glen-Bott, H. conglomeratum Glen- Bott, H. fractum P.J. Fisher, H. paradoxum Peyronel, N. tubulosum (Ble ss) Linder, and H. westerdijkiae van Beverw. A brief description from pure culture is provided for each species. All the reported species ar e new to Spain.