 A promycelium is formed that consists of a short hypha (equated to a basidium).In some smuts such as "Ustilago maydis" the nuclei migrate into the promycelium that becomes septate (i.e., divided into cellular compartments separated by cell walls called "septa"), and haploid yeast-like conidia/basidiospores sometimes called sporidia, bud off laterally from each cell.In various smuts, the yeast phase may proliferate, or they may fuse, or they may infect plant tissue and become hyphal.