The ascomycetes are commonly known as sac-fungi. They are mostly multicellular, e.g., Penicillium, or rarely unicellular, e.g., yeast (Saccharomyces).
The asexual spores produced by them are called as conidia. They are produced exogenously on the special mycelium named as conidiophores. Conidia on germination produce mycelium.