Aspergillus  -  head of   an Aspergillus species to show the single layer of conidiogenous cells   (= uniseriate) radiating from the vesicle.   At maturity this would form a spherical head.   Compare with Aspergillus fumigatus where the conidiogenous cells are also in a single layer but arise only from the upper half of the vesicle and at maturity produce a columnar head (click here).