Observations on the type of Coprinus latisporus

On the type of Coprinus latisporus
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Original description

Coprinus latisporus P. D. Orton, sp. nov. Fig. 1, m-n.
Orton, P.D. 1972. Notes on Brotish Agarics 4. In Notes R. bot. Gdn Edinb. 32: 140.

A sporis majoribus et velo albo a sociis distinguitur. Probabiliter pileus major crescit. Pileus primo ovatus 5-6/4-5 mm, niveus dein ad discum versus griseascens, minute atuniato albofarinosus, ad marginem leviter lacerato-crenatus. Lamellae anguste adnatae, leviter ventricosae, ex albo nigricantes, subconfertae, L= 28, l=0(1), ad aciem primo alboflocculosae. Stipes 20-24/1-1.5 mm, niveus, albofarinosus. Caro tenuissima, ad discum pilei leviter grisea. Odor nullus. Sporae forte lentiformes, ellipsoideae vel ovoideae aut obscure globoso-sexangulatae, 14-16/8-9/10-12.5 ľm, (Fig. 1,n), in cumulo umbrinonigrae. Basidia 4-sporigera. Cystidia non vidi. Cellulae veli globosae vel late ellipsoideae, 26-90 ľm latae, laeves, tenuitunicatae.
Somerset. Bossington, ad fimum vaccae, 30 X 1957, Orton 1145 (holo. E).

Cap ovoid at first, 5-6/4-5 mm, snow-white then greyish from the margin in, minutely white atomate granurlar-mealy, margin slightly fringed crenate. Gills narrowly adnate, slightly ventricose, white then blackish, fairly crowded, L= 28, l= 0(1), edge white flocculose at first. Stem 20-24/1-1.5 mm, ą equal, white and white mealy like the cap. Flesh very thin, slightly coloured in cap centre. Smell none. Spore-print blackish-umber.
Spores markedly lentiform, ellipsoid or ovoid in side-view, indistinctly angular-globose in face-view, 14-16/8-9/10-12.5 ľm (Fig. 1, n) germ pore slightly excentric. Basidia 4-spored. Cystidia not seen. Cell of veil globose or broadly ellipsoid, 26-90 ľm broad, cell-walls smooth and rather thin. Somerset. Bossington, on cow dung, 30 X 1957, Orton 1145 (holo. E).

It could be mistaken for a small C. niveus, but differs from that species in its differend shaped spores, which are less elongate in side-view and more rounded and less angular in face-view, and in the smaller fruit-body with less copious veil.
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