Mold Penicillium citreonigrum – The story of the unplanned fungus
The mold species Penicillium citreonigrum was first described in 1901 in the “Annales de la Société Scientifique de Bruxelles” by Dierckx. To this day, and significantly in the period before the Internet, the species Penicillium citreonigrum has been described under four other species names.
As Penicillium citreonigrum is not described as having an increased water requirement, the species is not one of the recognized indoor humidity indicators.