sp. nov., a new species from Australia related to

During routine surveys of , a widespread tree currently experiencing decline over a large area of its native range of south west Western Australia, a slow growing species was often recovered from roots and rhizosphere soil. This species grew more slowly, produced a wide array of morphological features and was visibly different to all other species present in Western Australia. Phylogenetic analyses of the ITS, 1, HSP90, β-tubulin and NADH gene regions confirmed this to be a new species closely related to and the provisional species . ‘ohioensis’. The new species is described here as sp. nov. It produces persistent, papillate sporangia of variable shape, oogonia with thick-walled oospores, and paragynous antheridia. To date this species has only been recovered from Pathogenicity trials indicate that while can infect the roots of it does not lead to seedling death.