Other morphological characteristics were, however, distinguishable. The most noticeable differences between these three Penicillium isolates and P. raistrickii were: on CYA, a colony surface that was radiately sulcate with few furrows and reversed colouring (fromlight yellow to brown); the presence of light brown exudates; on MEA, the presence of the centre overlaid with sectors of shallow radiating white sterile hyphae; penicilli that were often terverticillate, yielding conidiophores that were less rugose with shorter stipes, metulae and phialides and with bigger conidia.