Graphium sp.

The genus Graphium is characterized by the formation of synnemata which consist of a more or less compact group of erect conidiophores that are cemented together, usually splaying out and bearing conidia at the apex. Synnemata are darkly pigmented, erect and occur solitary or in clusters. Conidia are hyaline, 1-celled, smooth, subglobose to ovoid and are usually aggregated in slimy heads at the apex of the synnemata. Colonies are effuse, grey, olivaceous brown or black.  RG-1 organism.

Synnemata and conidia of Graphium sp.

Clinical significance:

Graphium is one of the anamorphs of Pseudallescheria boydii and is commonly found on woody plant material.

Mycosis: Hyalohyphomycosis

Further reading:

McGinnis, M.R. 1980. Laboratory handbook of medical mycology. Academic Press.