The authors report on the observation of three types of basidiospores in several European species of Amanita. These include normal thin-walled smooth basidiospores, thick-walled ones with internal ornamentation (“crassospores”), and thin-walled spores with external amyloid ornamentation (“examylospores”). These types occur irregularly and only in some carpophores. In the course of years we observed in some specimens of various species of Amanita besides normal thin-walled and smooth basidiospores also two other types of basidiospores which do not seem to be mentioned in literature. Normal basidiospores of Amanita are thin-walled, smooth without any ornamentation and either amyloid or inamyloid depending on the species. The two other types are abnormal spores, which are not present in all specimens studied, but could be observed only in some samples — they occur only in a minority of the samples taken.
Kotilová-Kubičková L., Pouzar Z. (1988): Three types of basidiospores in Amanita. – Česká Mykologie 42(2): 65–70.
