Coprinellus radians
Coprinellus radians
Coprinellus radians
Cap detail
Caulocystidia
Pleurocystidia
Spores
Velar remnants
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Coprinellus radians (Desm.) Vilgalys, Hopple & Jacq. Johnson, 2001
Description: Solitary to gregarious, small auto-digesting Coprinus. Several specimens seen from egg phase to mature and fully digested (stipe only).
Pileus: Convex initially, flattening on maturity and auto-digesting. Size is about 30mm in diameter, with upturned margins, deeply sulcate with splitting at the edges. Pileus is coloured brownish in the younger specimens becoming greyish on maturity. Cap centre is slightly raised and coloured brown. Velar remnants on pileus present as scattered white flocculose granules, but present as wooly flocculose in younger specimens some of which are with a dark brown centre. Setae or hairs absent.
Stipe: Cylindrical and tapering upwards, hollow centrally, hyaline without colour change on cutting and sub-bulbous at base.
Gills: Free, black and auto-digesting, without lamellulae.
Spore Print: Blackish liquid.

Microscopy:
Basidia:
4-spored
Pileipellis: Rounded cells 21-27µm diameter
Pileocystidia: Absent.
Cheilocystidia: Undifferentiated (Gill margin cystidia may have been digested).
Pleurocystidia: Present as large elliptical cells, abundant.
Stipe: Caulocystidia (78-97µm length, 17-24µm wide at widest point and 5-7µm wide at the tip) present in bunches of 2, 3 or more.
Spores: Ellipsoid, dark brown, smooth with germ pore. L =8.3-11.3µm length (mean 9.5µm), W=5.2-6.7µm width (mean 6.0µm), Q= 1.41-1.77 (Qm= 1.58). Germ pore small 2.1-2.8µm
Links:
Index Fungorum
Bender's site
- in German
CS90 Buskett on rotting wood (29/09/10)
Pleurocystidia
Spores
Caulocystidia
Velar remnants
Identified by Hans Bender, personal communication
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AGARICALES
Psathyrellaceae