Endosporoideus gen. nov., a mitosporic fungus on Phoenix hanceana.

Endosporoideus pedicellata gen. et sp, nov. is described and illustrated from decaying petioles of Phoenix hanceana collected from grassland in Tai Mo Shan, Hong Kong. The genus is unique in producing solitary, phragmosporous conidia. The conidia comprise a brown to dark brown inner-wall layer and thick, hyaline outer-wall layer and are produced holoblastically from determinate conidiogenous cells on micronematous, mononematous conidiophores. Cells of conidia may disarticulate at the septa. Representative steps in conidiogenesis of E. pedicellata are illustrated with light micrographs, and details of the conidiogenous events are interpreted schematically.