On the type of Coprinus singularis
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Original description

Coprinus singularis Uljé, spec. nov.
Uljé: New species of Coprinus, Persoonia Vol.l3(4): 488. 1988.

Pileus fortiter plicatus, initio subglobosus vel ovoideus, ad 3 x 2 mm, pallide brunneus, striis parum obscurioribus; postea expansus, ad 8(-11) mm latus, cinerascens sed centro color brunneus persistens, sub lente subpubescens. Lamellae 8-16, anguste adnatae, primo albae, dein cinereae vel atro-maculatae. Stipes ad 35 x0.7 mm, basi subbulbosus, hyalinus, sparsim pubescens. Sporae 9.5-17 x 6.5-11 µm, ellipsoideae vel cylindrico-ellipsoideae, obscure rubro-brunneae, poro germinali centrico indistincto praeditae. Basidia 15-34 x 8-10 µm, bispora, pro parte unispora. Cheilocystidia 30-50 x 12-17 µm, lageniformia, collo 3-5 µm lato. Pleurocystidia nulla. Pileipellis constans ex cellulis ovoideis vel globosis et pileocystidiis 50-85 x 11-18 µm, collo 3.5-8 µm lato, lageniformi-bus. Caulocystidia 30-90 x 11-20 µm lageniformia, collo 3.5-9.5 µm lato. Fibulae adsunt. - Typus: 'Netherlands, prov. Zuid-Holland: Alphen a/d Rijn, Zegerplas, 21 VIII 1987, C. B. Uljé 850' (L). Etymology: singularis, solitary.

Closed pileus up to 3 x 2 mm, subglobose to ovoid, pale brown (Mu. 10 YR 7/3; K. & W. 4A3) with somewhat darker striation; expanded pileus up to 8(-11) mm wide, soon becoming very thin and greyish to almost hyaline but remaining brownish at centre particularly when dehydrated (Mu. 7.5 YR 5/6), rather strongly sulcate already in early stages, seemingly glabrous but under lens subpruinose. Lamellae L = 8-16, l = 0-3, narrowly adnate, white at first then grey to blackish spotted. Stipe up to 35 x 0.7 mm, subbulbous at base, hyaline, sparsely pubescent. Smell absent. Spores [120/6/4] 9.7-17 x 6.8-10.9 µm, Q = 1.20-1.70, Q = 1.35-1.47, L =11.4-14.4, B = 8.5-9.1, ellipsoid to cylindrico-ellipsoid, in frontal view often slightly flattened at both sides of apiculus, dark red-brown, with central, rather indistinct germ pore. Basidia 15-34 x 8-10 µm, 2-spored but also rather frequently 1-spored, surrounded by 4-6 pseudoparaphyses. Pleurocystidia absent. Cheilocystidia 30-50 x 12-17 µm, with tapering 3-5 µm wide neck and rounded apex, lageniform, colourless, thin-walled. Pileipellis consisting of globose to ovoid cells up to 30 x 25 µm (in grooves slightly larger) and lageniform pileocystidia 50-85 x 11-18 µm, with tapering to cylindrical 3.5-8 µm wide neck and thin, colourless walls. Caulocystidia 30-90 x 11-20 µm with rather cylindrical, 3.5-9.5 µm wide neck, colourless, thin-walled. Clamp-connections present.
Habitat. - Solitary on lawns, particularly at bare spots.

Collections examined. - NETHERLANDS: prov. Zuid-Holland: Alphen a/d Rijn Edelsteensingel, 28 July 1985, Uljé 671; ditto, near Zegerplas, 3 Sept. 1985, Uljé 503, 21 Aug 1987 Uljé 850 (type; L) & 22 Sept. 1987, Uljé 853, and several other collections from same area. (All col-' lections in herb. Uljé unless otherwise mentioned.)

Within subsection Setulosi, Coprinus singularis is highly characterized by its large cylindrico-ellipsoid spores with central germ pore on 2 -spored basidia. In all collections of which some were found more than one kilometer apart, there is a limited number of 1-spored basidia intermixed with the 2-spored ones, which explains the great range of spore-sizes given above.
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Fig. 4A-F. Coprinus singularis. - A. Basidiocarps x 1. - B. Spores x 2000. - C. Basidia x 800. - D. Cheilocystidia x 800. - E. Caulocystidia x 800. - F. Pileocystidia x 800.
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