1486. Arcyria cincta Schumach.

1486. A. cincta, congesta, minuta, primo albida, tunc flavescens ovata, deinde dilute croceo-rufa, demum peridio ovato conica, rufo, margine calyculi dilutiore subelevato notato; capillitio ovato, concolore, decidio; stipite longo dilute rubro, deorsum albido incrassato.
In trunco quercino subemortuo. Novemb. inveni.

Schumacher figure 82.2:
Schumacher figure 82.2: Arcyria cincta
Reproduced with permission from the Natural History Museum of Denmark ©

Text accompanying figure 82.2:
Arcyria cincta m:
In trunco putrido quercino. Novembr.

Previous interpretations:
Source Interpretation
Rostafinski (1875: 269) Arcyria denudata (L.) Wettst. (as Arcyria punicea Pers.)
Raunkiær (1888: 59) Arcyria denudata (L.) Wettst. (as Arcyria punicea Pers.)
Lister (1894) Not mentioned
Lister (1911: 240) ? Arcyria denudata (L.) Wettst. (as Arcyria denudata Sheldon ?)
Lister (1925: 235) ? Arcyria denudata (L.) Wettst. (as Arcyria denudata Wettstein ?)
Bjørnekær & Klinge (1964: 204) Arcyria denudata (L.) Wettst.
Martin & Alexopoulos (1969: 410) Cite Lister (1925:325): "possible synonym of Arcyria denudata".

Arcyria denudata (L.) Wettst. seems to be the interpretation agreed upon by all cited references - some with reservation. Fries (1829: 181) mentions A. cincta under Arcyria ochroleuca, which today is considered a synonym of Arcyria pomiformis (Leers) Rostaf.

A least one phrase in the text makes this interpretation unlikely: "capillitio ovato, concolore, decidio". The capillitium of A. denudata is firmly attached to the calyculus. Arcyria species from the temperate zone with a capillitium only slightly expanding (i.e. not drooping) and falling away from the calyculus are few. A. incarnata (Pers. ex J.F. Gmel.) Pers. and Arcyria ferruginea Saut. are the most obvious candidates in Denmark.
The words "ovato" and "deciduo" are here intrepreted as characters of a perfectly matured specimen with a hardly expanding capillitium only attached to the calyculus with few tubules.

The indications of colours: "croceo-rufa" and "rufo" excludes A. incarnata, leaving A. ferruginea as the only likely option. Schumacher's figure clearly supports this. The rightmost sporocarp shows, in the view of this author, a quite typical A. ferruginea sporocarp.
The only phrase of the diagnose which contradicts this view is the colour, "albida, tunc flavescens", of the immature sporocarps. A. ferruginea has pink sporocarps, as Trichia depiens (Pers.) T. Macbr., in the immature state.

However, all the available information taken into consideration leaves no doubt with the present athor:

Arcyria cincta Schumach. is an earlier, valid, name for Arcyria ferruginea Saut.