Aspergillus conidia

Aspergillus has a distinctive conidiophore that has a stalk and an inflated tip (called a vesicle) with phialides that produce the conidia. (In biserate conidiophores, the vesicle produces metulae, which in turn produce the phialides). The conidia are small 2-5 µm in size, spherical or ovoid, and may be  ornamented. Spores may be colorless or pigmented, and the ornamentation may pigment. Conidiophores and conidia can be found in Aspergillus cultures. Due to the similarity of Aspergillus and Penicillium conidia, they are identified as Penicillium/Aspergillus-type conidia on spore trap samples.