Notes on Agaricales — I

Full descriptions of Agrocybe pusiola (Fr.) Heim and A. putaminum (Maire) Sing. are given. The following items may be stressed: (i). Pleurocystidia and cheilocystidia of both species appear to contain many nuclei when coloured with aceto-carmine. (ii). Agrocybe pusiola most probably has a gelatinized veil. (iii). Agaricus laevis Pers. is not conspecific with Agrocybe pusiola as was claimed by Fries. (iv). Agrocybe putaminum has, in addition to the normal pleurocystidia, a remarkable type of cystidia with yellowish contents. (v). The habitat of A. putaminum is not confined to fruit-stones.