 Tricholoma pardinum lies within the subgenus Pardinicutis of Tricholoma , a grouping of similar species characterised by greyish , brownish , or pallid caps that are woolly or covered in small scales , spores with a length between 8 and 11 micrometres , and abundant clamp connections in the hyphae . Molecular analyses suggest that T. pardinum is closely related to T. huronense , T. mutabile , and T. venenatum . Tricholoma pardinum var. filamentosum is an uncommon variety , described in 1983 by Carlo Luciano Alessio , which produces mushrooms with more fibrillose caps and stalks than the typical variety . It is found in southern Europe , where it associates with chestnut and spruce trees . Another variety has been described as T. pardinum var. unguentatum , characterised by daintier mushrooms that have a greasy coating on their caps . 
