Table 2.

Summary of morphological characteristics used to discriminate psathyrelloid genera in the Psathyrellaceae.

	Britzelmayria	Candolleomyces	Cystoagaricus	Heterospathyrella	Homophron	Iugisporipsathyra	Kauffmania	Lacrymaria	Olotia	Psathyrella	Typhrasa
Pileus surface	smooth	smooth	fibrillose, squamulose, spiny, or squarrose; hyphae	smooth	smooth	non-obvious villus; hyphae	smooth	tomentose; hyphae	smooth	smooth	slight to distinct ridge-like folds
Veil	wipeable; hyphae	wipeable; hyphae	absent	wipeable; hyphae	absent	absent	wipeable; hyphae	absent	wipeable; hyphae	wipeable; hyphae, rarely subglobose cells	wipeable; hyphae
Cap or lamellae	non-deliquescent	non-deliquescent	non-deliquescent	non-deliquescent	non-deliquescent	non-deliquescent	non-deliquescent	non-deliquescent	non-deliquescent	non-deliquescent	non-deliquescent
Spore surface	smooth	smooth	smooth	smooth	smooth	ridges ornamentation with obvious suprahilar plage	smooth	often warty	smooth	smooth, rarely granulose or with myxosporium	smooth
Basidia	monomorphic	monomorphic	monomorphic	monomorphic	monomorphic	monomorphic	monomorphic	mono- to dimorphic	monomorphic	monomorphic	monomorphic
Pseudoparaphyses	absent	absent	absent	present	absent	present	absent	absent	absent	rarely present	absent
Pileipellis	paraderm	hymeniderm to paraderm	paraderm	hymeniderm to paraderm, covered by a 1 cell deep layer of periclinal hyphae	hymeniderm to paraderm. simple hairs sometimes present	Hymeniderm, mixes with sparsely simple hairs	hymeniderm to paraderm	hymeniderm	hymeniderm to paraderm	hymeniderm, paraderm, rarely cutis	hymeniderm to paraderm
Pleurocystidia	thin-walled	absent	thin-walled	thin-walled	thick-walled	absent	thin-walled	thin-walled	predominantly spatula-shaped and strongly pediculated	thin-walled or rarely slight thick-walled	thin-walled, with intracellular oily drops or globules
Cheilocystidia	present	present	present	present	present	present	present	present	present	present	present
Pileocystidia	present	absent	absent	absent	absent	absent	absent	absent	absent	very rarely present	absent