Tuesday, 27 October 2015

Caloplaca flavovirescens near Settle

Learn your lichens 2.

Distribution map of Caloplaca flavovirescens in UK

Caloplaca flavovirescens forms big pale yellow  egg-yolk coloured patches (up to 15 or 20cm) and the margin of the patch is whitish. It should be called Fried Egg Lichen.

Around here it seems to grow on cement type substrata.

I have found it in four places:

1. E and J's house doorstep, Stackhouse Lane

2. The Locks, Langcliffe
3. One patch on a stone in the north wall at Horton Churchyard
4. Paving stone beside War Memorial outside Ingleton Churchyard

1. It grows on the front doorstep of a house on Stackhouse Lane overlooking the school 

A drop of  strong alkali  - in this case
sodium hydroxide solution -  turns
 the minute fruiting bodies from orange to crimson

Here, another species of Caloplaca  (Caloplaca holocarpa - grey with orange fruiting bodies) isgrowing next to it,  and prevents the C flavovirescens from making a circular patch

Frank Dobson's Lichens book is placed near the Caloplaca  flavo-virescens,
with a view across the road to the school trees

Reverse view.

Stackhouse Lane in autumn

I was first shown Caloplaca flavovirescens at Ingleton at the war memorial outside the church

Caloplaca flavovirescens

Caloplaca flavovirescens - This turns red with alkali

Caloplaca flavovirescens


This morning (27 Oct 2015) I went down to The Locks at Langcliffe to rephotograph the Caloplaca flavovirescens It also on the wall top to the north of the stone "bridge/dam" at the top end of the Locks, and next to the stile opposite. 

This is front right in the picture above,..
though it is on the wall to the left of me above that
Next to the stile

The same ones looking to the bridge

The same ones larger

Finally an autumn view of the river

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