Friday, 12 February 2016

Physcia tenella - Fringed Rosette Lichen


 Learn your lichens 6.
The Physcia is the teeny weeny grey foliose lichen covering the trunk in the bottom two thirds of the picture on the left. (The large grey foliose lichen is a Parmelia (saxatile or sulcata) - look forward to that another day)

You are probably more likely to find Physcia on a tree in Settle than any other species of lichen.  If you can see a big yellow Xanthoria have a look nearby for Physcia.  Tenella means delicate.

Learn your Lichens Series
1. Arthonia radiata
6. Lecanora gangaleoides
7. Physcia tenella

The ruler on the left shows centimetres
divided into millimetres. Look more closely..



This one is fruiting. You can see the black discs. 

This species of Physcia has cilia ("hair-like projections"), sometimes with black tips growing from the undersurface.
I photographed this through my hand-lens. See the cilia
The thallus has gone pinkish because it is infected by a fungus



The top picture is of Physcia tenella on this Mountain Ash at Langcliffe, but there are at least 12 other species of (mostly bigger) lichens on it too - a fantastic tree.
....and five mosses
.... and two liverworts.
I photographed the other pictures on the nearest tree here in Malham YDNP car park several years ago, ready for my Algae and Lichens of Malhamdale walk.
  






The etips of the thallus are curled up at the top right of the picture and the undersurface of the tips are covered with powdery soredia. You can see the cilia clearly here.  this picture was taken on an oak branch in Grinton churchyard

Saturday, 23 January 2016

Lichens at Wallington House in Northumberland with BLS

Sunday 17th Jan was sunny and cold.
After my dawn walk over the Tyne, I had breakfast at the Euro Hostel and then drove c 20 miles NW of Newcastle to Wallington. I parked in an open car park facing the sun. About 25 people eventually arrived.






Janet Simkin our leader and organiser introduced us to Paul? (Red jacket and dog) from the National Trust. He told us it was one of the top 25 most visited properties of the National Trust, and the agricultural estate was 30 sq miles.
 I set off with Allan Pentecost towards the walled garden but before we reached the road we came across some box trees.

On the  box branches we searched for a special rare lichen called Fellhanera bouteillei which we failed to find. But Hey ho - I shall always look out for it on box now.


There was lots of green "grot" alga - Apatococcus lobatus - which is a bit like Desmococcus  (I found Apatococcus on a tree in Coventry.. but it is probably the green grot you see in lots of places)

Then on the leaves there was a special alga called Phycopeltis foliosus. This forms orbicular orange brown patches on evergreen leaves. The filaments are closely packed together and radiate outwards and the plants resemble small upturned mushroom caps. The species are common in the tropics but rare elsewhere. Link

Phycopeltis foliosus



In the walled garden at the top there was a spring/trough which had overflowed
- maybe in the recent floods - there were lots of pea mussels.



Lecidella stigmatea on vertical wall at top of walled garden
Lecidella stigmatea on vertical wall at top of walled garden
Belonia nidarosiensis (Clathroporina calcarea): Thallus a powdery crust orange to red flecked with white.  found on vertical shaded north and east limestone and mortar walls. Some jagged angles at edge of thallus.
Gyalecta jenensis- these are only 1 mm across.

Fairy Foxglove - Erinus- on SW facing wall of walled garden - white stuff includes Diplotomma albo-atrum



Diplotomma albo-atrum



See the yellow patch on the brick wall..



It is Caloplaca citrinum

Tephromela atra or possibly Lecanora ganagleioides on the wall


This is an Opegrapha that Allan took home
Physconia sp.
Physconia sp.


Melanelia..? growing with Parmelia sulata



The Thelotrema lapida growing into the Pertusaria pertusa makes a splendid photo.





Beech tree with Pertusaria pertusa by the lake


Young Pertusaria pertusa on branch of young shrub - growing with concentric rings.



Then we came back onto the lawn at the main house
where people were looking at two lichenocolous fungi




Marchandiomyces-aurantiacus

Marchandiomyces-aurantiacus: This is peach coloured
On a horsechestnut tree nearby was a flourescent ink fungus- Illiosporiopsis christiansenii

Illiosporiopsis christiansenii

Illiosporiopsis christiansenii



The grey lichen on the right with cone shaped pycnidia with whitish tips is
Lecanactis abietina.
The yellowy orangy streak down the centre with black pinheads on stalks is Chaenotheca ferruginea

Chaenotheca ferruginea



Peltigera membranacea - there is whitish felt /powder on the edge of the thallus





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Sarea resinae - Resin Fungus




Arthonia spadicea - tar spot lichen

A fungus

Thursday, 21 January 2016

British Lichen Society AGM at Newcastle

Leaving Settle for a couple of days and going to the AGM at Newcastle on 16-17 Jan 2016. 

"Please can you tell me where the Agriculture Building is?" I ask a young man. "Lichen Society ?" "He asks.. "I'm going there too". But first we have to stop at the wall outside the Agriculture Building







Caloplaca holocarpa

Lecidella scabra on acid rock.
The drop of KOH solution turns yellowish

he demonstrates how he keeps lichens- stuck on card with Copydex




AGM

AGM
 Fun over bridges


After supper I walk over the high bridge

and look back to see three more bridges

Then come out in early morning 7-30am and walk across the Tyne Road bridge to see the bridges at dawn



After breakfast I will set of for Wallington.. More on that tomorrow