From Roger Philips - Mushrooms :-
Panaeolus Subbalteatus synonym Panaeolus Cinctulus
Cap 2-6cm across, convex at first expanding to almost flat with a broad umbro, dark reddish-brown when moist drying buff to pale tan from centre outwards leaving a darker zone at margin.
Stem 60-90 x 3-5mm, buff or pale brown with paler apex.
Flesh thin, brownish. Taste not distinctive, smell mushroomy.
Gills adnate, pale tan at first rapidly blackening.
Spore print black. Spore lemon shaped, 12-14 x 7.5-8.5 um.
Habitat in manured places especially gardens and compost heaps.
Season early summer to autumn. Rare.
Cap 1-2cm across, bell shaped to convex, dark dull-brown drying out pale clay brown from the rust coloured centre outwards to the margin which often remains darker.
Stem 40-70 x 2-3mm, paler than cap.
Flesh buff to pale brown. Smell not distinctive.
Gills adnate, pale brown when young soon becoming mottled darker.
Spore print brownish black. Spores lemon shaped, rough, with germ-pore, 12-15 x 7-8.5um.
Habitat in grassland and on lawns and roadsides.
Season summer to autumn. Common.
Edited by Cuboid, 13 October 2017 - 04:02 PM.