A hypha (plural hyphae) is a long, branching filamentous structure of a fungus, and also of unrelated Actinobacteria.
Komatsu et al.found that hyphae of T. wiesneri overwintered in symptomatic shoots of Cerasus X yedoensis.
A variation on this staining method is used in mycology to differentially stain acid-fast incrustations in the cuticular hyphae of certain species of fungi in the genus Russula.