Basidiospore

Basidiospores typically each contain one haploid nucleus that is the product of meiosis, and they are produced by specialized fungal cells called basidia.

Some gilled mushrooms in the order Agaricales have the ability to release billions of spores.

The spores are released during periods of high humidity and generally have a night-time or pre-dawn peak concentration in the atmosphere.

These hyphae grow outward from the original spore, forming an expanding circle of mycelium.

Basidiospores are generally characterized by an attachment peg (called a hilar appendage) on its surface.