Intermediate between _S. squamosa_ and _Psilocybe coprophila_, having scaly p. and ring of former, and stature of latter.
=merdaria=, Fr. P. 1.5-2.5 cm. exp. obtuse, glabrous, moist, hygr. dingy yellow-brown or pale bay; g. adnate, broad; s. 2-3 cm. flocculose, dry, pallid, ring fugacious; sp. 8 × 5. (12-16 × 6-8 Sacc.)
[=mammilata=, Kalchbr. P. thin, exp. conico-papillate, even, viscid, pale ochre; g. rotundato-adnate, blackish brown; s. glabrous, white then yellowish, ring fugacious.
=stercoraria=, Fr. P. 2-3 cm. hemispher. then discoid, rather viscid, glabrous, yellow; g. adnate, broad, olive-black; s. 8-10 cm. stuffed with free pith, elongated, flocculose below the distant ring, rather viscid, white tinged yellow; sp. 18-20 × 8-10.
=semiglobata=, Batsch. P. 2-3 cm. persistently hemispher. even, glutinous, yellow; g. adnate, broad, clouded black; s. 6-10 cm. glabrous, glutinous, yellowish, ring imperfect, inferior; sp. 12 × 6.
Differs from _P. stercoraria_ in persistently hemispher. p. and glabrous s.
[=siccipes=, Karst. P. hemispher. exp. obtuse, orbicular, naked, even or edge slightly pellucidly striate, viscid, whitish clay-colour; g. adnato-subdecur. clay-colour then fuscous and clouded; s. pallid, dry, straight or wavy, flocculose, pruinose above the distant, dry ring; sp. 12-15 × 7-9.
Intermediate between _S. stercoraria_ and _S. semiglobata_.
[=paradoxa=, P. Henn. P. campan. papillately umb. viscid, centre brown, edge broadly revolute, even, glabrous; g. adnato-decur. wavy, veined, dusky brown; s. wavy, striate, fibrous, yellow, base white-downy, ring black, floccose, deciduous; sp. 14-17 × 7-10.
B. SPINTRIGERI. _Pileus without a pellicle, but innately fibrous, not viscid._
[=calceata=, Schaeff. P. exp. adpressedly fibrillose, moist, stoutly umb. even, dingy yellow then pale; g. nearly free; s. solid, glabrous, white, base marginately bulbous, limb free like a volva.
[=ocreata=, Holmsk. P. globoso-campan.-exp. obtuse, granulose then imbricately scaly, red then gilvous; g. nearly free; s. peronate up to imperfect ring.
[=medusa=, Brig. P. globose then convex, even, subrimosely squamulose when dry, yellowish white, edge lobed; g. nearly free, sooty, edge crenulate; s. solid, subtuberous, fibrillose, white, ring fugacious.