Key to Psathyrella

P. seymourensis A. H. SM.
13 (10) Spores very strikingly phaseoliform.
(see also P. cotonea). 14
13* Spores at most slightly phaseoliform. 17
14 (13) Pleurocystidia lageniform, top narrow.
C. 10-25 mm broad. Veil scanty. Sp. (8,5)9-11(12,5) x 5-6(7) µm. Pl. 35-60 x 8-
13(15) µm. Ch. 25-40 x 8-20 µm, closely packed. Dunes, sandy soil.
P. flexispora T. J. WALLACE & P. D. ORTON
14* Pleurocystidia utriform, top +/- broadly obtuse. 15
15 (14) Spores up to 11,5(12,5) µm long.
C. up to 28(35) mm broad. Veil scanty. Sp. 9,7-11,5(12,5) x 5,2-6(6,5) µm,
mostly phaseoliform. Pl. 35-65 x (10)12-20 µm. Ch. 25-54 x 10-18 µm. Observed
on a cornfield.
P. agraria ENDERLE (ad. int.)
15* Spores up to 10 µm long. 16
16 (15) Spores 8-10 x 5-6 µm.
C. up to 18 mm broad. Veil scanty or absent. Pl. 30-50 x 10-12,5(20) µm. Ch. 27-
35 x 7,5-10(12) µm, rare. Soil.
P. phaseolispora ARNOLDS
16* Spores (6,5)7-9,5(10) x 4,5-5,5(6) µm.
C. up to 50 mm broad. Veil distinct. Pl. 32,5-55(70) x 9-15(17,5) µm. Ch. 27,5-
40(60) x 9-15 µm, rare. Solitary and caespitose, soil.