GLOMUS CORYMBIFORME, A NEW SPECIES IN GLOMALES FROM POLAND

Glomus corymbiforme sp. nov. is described and illustrated. This fungus was found associated with roots of different plant species colonizing maritime sand dunes adjacent to Swinoujscie in northwestern Poland. G lomus corymbiforme is distinctive in forming corymbiform sporocarps wi th spores enveloped individually by a hyphal mantle composed of dichot omously branched hyphae. Spores are pastel yellow to orange, globose t o subglobose, (50-)142(-220) mu m in diameter or ovoid to pyriform, 11 0-125 x 120-200 mu m. Spore wall structure consists of an outermost un it wall tightly adherent to a middle laminated wall and of a separable innermost membranous wall. Glomus corymbiforme produced spores and ve sicular-arbuscular mycorrhizae in single-species pot cultures with Sor ghum vulgare.