A new violet species of Inocybe (Agaricales) from urban and rural landscapes in Western Australia

A violet species of Inocybe, for which the name I. geophylla var. lilacina has often been misapplied, is described as new from urban bushlands and Eucalyptus forests and plantations in southern Western Australia. The name I. violaceocaulis is proposed to accommodate this species that is characterised by the violet to lilac colour, elliptic basidiospores, the presence of pleurocystidia, infrequent caulocystidioid cells, presence of a veil, and host association with myrtaceous plants. The taxonomy and systematic position of I. violaceocaulis within Inocybe are