Dimorphic fungi

Dimorphic fungi are fungi which can exist as mold/hyphal/filamentous form or as yeast. An example is Penicillium marneffei:

Several species are potential pathogens, including Coccidioides immitis,Paracoccidioides brasiliensis,Candida albicans,Ustilago maydis,Blastomyces dermatitidis, Histoplasma capsulatum, Sporothrix schenckii, and Emmonsia sp.

...
Wikipedia