"Aspergillus terreus" has conidial heads that are compact, biseriate, and densely columnar, reaching 500 × 30–50 μm in diameter. Conidiophores of "A. terreus" are smooth and hyaline up to 100–250 × 4–6 μm in diameter. The conidia of "A. terreus" are small, about 2 μm in diameter, globose-shaped, smooth-walled, and can vary from light yellow to hyaline. Unique to this species is the production of aleurioconidia, asexual spores produced directly on the hyphae that are larger than the phialoconidia (e.g. 6–7 μm in diameter). This structure might be influential in the way "A. terreus" presents itself clinically as it can induce elevated inflammatory responses.