The colonies reach a diameter of 1 to 3 cm following incubation at 25°C for 7 days on potato glucose agar. The texture is cottony to powdery or mealy. The surface is white to yellowish white or pale pinkish in color. The reverse is white or pale. The hyphae are hyaline, septate, and narrow. The conidiogenous cells on the hyphae are typically flask-shaped with an inflation at the base and narrow zigzagging filaments at the apex. Laterally from the filament, conidia are produced from each bending point. This type of conidium production is called sympodial geniculate growth. The conidia (diameter: 2-4 µm) are hyaline, one-celled and globose to ovoid in shape. The conidiogenous cells tend to form dense clusters. These clusters appear as small powdery balls in the aerial hyphae when viewed through dissecting microscope. Since the cluster formation makes it difficult to visualize the arrangement and structure of conidia, examination of young cultures is optimal for detailed microscopic view .