Recorded by Bell (1983) but, except for dimensions of the basidiospores, without further data. The dimensions given viz. 17-20 x 10-13 µm are more in keeping with C. pubescens. The spores should be (11-)12.5-16.5(- 17.5) x 7-10 µm for C. rickenii (Watling, 1982). If we are correct in that a couplet in the key has been switched the small spores (8- 9 x 5- 6 µm) still do not refer to C. rickenii. It is neither possible to say to what the measurements refer nor whether the collection is referable even to sect. Pilosellae. C. rickenii is characterised by 2-spored basidia; a small spored taxon growing on dung in the C. siliginea group is C. oculispora Locq.