Ginny B's picture

Could this be Protoblastemia calva?

Observed: 19th October 2012 By: Ginny B
S159 Neighbourhood Nature - course complete
Ginny B’s reputation in Fungi and LichensGinny B’s reputation in Fungi and LichensGinny B’s reputation in Fungi and Lichens
P1040264_unknown lichen
P1040265_unknown lichen with mm measure
P1040267_unknown lichen through a hand lens

These tiny, tan coloured, domed fruiting bodies (the measure in picture 2 is mm) are growing on the stone of a house wall that was at one time lime washed. I think this lichen is actually growing on what is left of the lime wash, but it difficult to be sure, so I’m uncertain if there is a thin, greyish white thallus or not. The fruiting bodies reacted K+ crimson.
Could this be Protoblastemia calva, a picture of which I found on the Internet and which it seems to resemble? Sadly there was no description of its preferred habitat.


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Some fungi are very poisonous so a mistaken ID could have serious consequences.

Species interactions

No interactions present.


synan's picture

Reminds me of...

the Caloplaca flavovirescens that I mistook for Protoblastenia rupestris... except my find had a yellow thallus.


Ginny B's picture

I see what you mean

I see what you mean, Nigel. They certainly do look rather similar but for the thallus colour.


Ginny B's picture

Thank you, gardener

Thank you for the identification. I should have found your link myself and obviously have been looking at the wrong websites!


AlanS's picture

But ...

You got very close!

Note that many British records of P. calva are actually P. lilacina.