ABSTRACT
Micromorphology: Characteristic features for this genus include hyphae that are hyaline and septate with dichotomous branching. Conidiophores arise from a basal foot cell and germinate into a vesicle at the apex. Conidiogenic phialides arise directly from the vesicle (uniseriate) or from intersected metulae (biseriate) depending on the species. Conidia are round (2-5 μm) and formed into radial basipetal chains (Figure 23.1). Species-speci–c features include the presence or absence of sclerotia, cleistothecia, Hülle cells, aleuriconidia, chlamydoconidia, and morphology of the vesicles and arrangements of phialides (Table 23.1).
