Crowned in Sticta

 Fencepost of the Week #248

 Sticta sylvatica thriving in a damp, shady corner of the paddock.

 

Bilberry Webs

 Fencepost of the Week #247

 

Minutely Fruticose Jelly Lichens

 Trying to make sense of some superficially minutely fruticose, corticolous jelly lichens in Cowal. 

Working primarily from the BLS Lichens of Great Britain and Ireland 3 pdfs

 

Row 1 entire organism

Row 2 surface structure (width ~3mm)

Row 3 cross section from near substrate (bottom left) to surface (top right)

Row 4  cells of the cortex (width ~150µm)

Column 1: this is Scytinium lichenoides with well developed isidia, I think. 

Column 2: also S. lichenoides. The isidia are so thick that the foliose thallus in completely hidden. But proves to be structurally similar when cut open.

Column 3: Is this Scytinium teretiusculum or a cyanomorph of Ricasolia amplissima?

Column 4: Ricasolia amplissima cephalodium

I've just found a paper describing a cyanomorph of Ricasolia virens. Column 3 conforms very closely to the description given here: The cyanomorph of Ricasolia virens comb. nov. (Lobariaceae, lichenized Ascomycetes) DOI: 10.5962/p.386096