Panaeolus subfirmus P. Karst. syn. P. speciosus P.D. Orton (illustrated 40% life size) Cap 2–7cm across, conical to convex; buff or dull brown at first, becoming more greyish, with darker olivaceous-brown zone near the margin, tinged ochraceous or tawny at the centre, drying greyish or buff; cracking. Stem 70–175×2–5mm; whitish, tinged tawny or greyish-pink, base dusted white; hollow. Flesh concolorous with cap; smell faint, mushroomy. Gills adnate; clay-buff, becoming mottled blackish. Spores 14–20×8–10×10–12¼, angular lemon-shaped. Spore print blackish. Habitat on horse or sheep dung; late summer to autumn. Uncommon. Unknown edibility.