 The chlamydospores are round, resting spores, produced on older mycelium or in macroconidia.Mycelium enters the roots and travels into the vascular xylem where it starts to produce microconidia, eventually clogging the xylem.Once the Koa tree dies, the fungus invades all tissues and, upon reaching the dead plant surface, sporulates profusely producing macroconidia and chlamydospores.