I was doing fieldwork on the northern slopes of Mynydd y Gaer (SN9486) on Friday, and noted a few bryos as I went along. Most were very commonplace species as would be expected on an acidic bracken slope, but the frequent ant hills were a bit more interesting with occasional Ptilidium ciliare, Campylopus pyriformis and the Bryum shown below.
These small reddish plants were growing mixed with C. pyriformis. After digging around I did find a few rhizoidal tubers, which were the deep red-brown colour suggested by the final photo. The rhizoids themselves were brown and papillose.
|Rhizoidal tuber placed on leaf to give indication of size|
|Cells somewhat incrassate. Leaves bordered with recurved margins.|
Given the dry acidic habitat, I wondered if this could be B. bornholmense, but I'm probably way off the mark. Any suggestions welcome, thanks.