Search found 44 matches

by CJohnsonOHBR
Mon Apr 13, 2020 8:11 am
Forum: Lichens
Topic: Hypotrachyna afrorevoluta or revoluta ?
Replies: 3
Views: 439

Re: Hypotrachyna afrorevoluta or revoluta ?

Thank you Mark and Neil for clarifying the differences between afrorevoluta and revoluta. I had been oscillating between the two and the more I read, the more uncertain I became. Always a time to seek expert advice. A new species for VC110 and one for the herbarium for future reference. The next cha...
by CJohnsonOHBR
Sun Apr 12, 2020 1:43 pm
Forum: Lichens
Topic: Hypotrachyna afrorevoluta or revoluta ?
Replies: 3
Views: 439

Hypotrachyna afrorevoluta or revoluta ?

Hypotrachyna is not common in the Outer Hebrides (5 records of 3 species) and this is the first time I have encountered the genus. So this query will be very short if I'm not looking at Hypotrachnya. It was collected from North Uist from a coastal conifer plantation and was found on a very small lar...
by CJohnsonOHBR
Thu Apr 02, 2020 2:57 pm
Forum: Lichens
Topic: Sterile crust on Aspen
Replies: 3
Views: 375

Re: Sterile crust on Aspen

Thank you Neil, your comments were extremely helpful. I have read the descriptions in LGBI, Dobson and Fungi and Lichens of Great Britain and Ireland again, discovered where I went astray in the key, and found a darker corner where to use the UV torch The soralia are now showing a very positive UV f...
by CJohnsonOHBR
Wed Apr 01, 2020 11:29 am
Forum: Lichens
Topic: Sterile crust on Aspen
Replies: 3
Views: 375

Sterile crust on Aspen

Any suggestions would be appreciated. Smooth, waxy bluish/grey thallus. The white areas seem to be associated with eroded soralia, and there are pale greenish soralia on the edge of the thallus or in the areas growing in the bark crevices. C-ve, Pd-ve, KC -ve, K -ve or a very faint reaction, UV-ve. ...
by CJohnsonOHBR
Sun Mar 22, 2020 11:23 am
Forum: Lichens
Topic: Fertile Usnea subfloridana
Replies: 0
Views: 1238

Fertile Usnea subfloridana

This specimen was collected from the same conifer plantation on North Uist at the same time as the fertile Parmotrema crinitum. Usnea subfloridana is widely distributed throughout the islands on both trees and fence posts, and when present is usually abundant. The presence of apothecia seems to be u...
by CJohnsonOHBR
Sun Mar 22, 2020 9:58 am
Forum: Lichens
Topic: Parmotrema crinitum apothecium
Replies: 2
Views: 603

Re: Parmotrema crinitum apothecium

Thank you Jenny, that is an interesting observation. With our mild oceanic climate and limited range of habitats (not many trees) not only is the range of species restricted but they are often unusual in their "behaviour" and choice of substrate. I often have to spend considerable time checking my i...
by CJohnsonOHBR
Wed Mar 18, 2020 12:13 pm
Forum: Lichens
Topic: Parmotrema crinitum apothecium
Replies: 2
Views: 603

Parmotrema crinitum apothecium

Last week we visited an abandoned trial conifer plantation on North Uist, Outer Hebrides, on an exposed, very wet moorland hillside (alt 102 m). One corner of the plantation had been hit by a severe gale at some time and there were a number of fallen, dead Sitka spruce. In this part of the world con...
by CJohnsonOHBR
Tue Feb 11, 2020 9:02 am
Forum: Lichens
Topic: A problematic Parmelia
Replies: 13
Views: 1304

Re: A problematic Parmelia

When I saw the initial post I was tempted to suggest Xanthoparmelia conspersa, but as a novice was rather reluctant to make the suggestion. The comment about using a tiny drop of reagent for the spot test is important, and I would add that the C+ red reaction can be very fugitive with the red colour...
by CJohnsonOHBR
Fri Jan 17, 2020 9:32 am
Forum: General fungi discussion
Topic: FRDBI
Replies: 15
Views: 3105

Re: FRDBI

I maintain the database for biological records for the Outer Hebrides (VC 110) for Outer Hebrides Biological Recording, a small group of amateur naturalists who collect and collate biological records for the islands on a voluntary basis. We have a policy of making all our records (apart from a few s...
by CJohnsonOHBR
Tue Oct 01, 2019 8:02 am
Forum: Lichens
Topic: Ramalina europaea in Britain
Replies: 6
Views: 2241

Re: Ramalina europaea in Britain

Thank you for drawing our attention to this new information on Ramalina europaea and R. pollinaria s.lat. A severe shortage of trees makes it unlikely that I will find either, although there is a record of R. pollinaria dating back to 1960 from Stornoway on the island of Lewis. I will look carefully...
by CJohnsonOHBR
Fri Mar 15, 2019 7:37 pm
Forum: Lichens
Topic: Lichenicolous Fungi UK Species List
Replies: 2
Views: 1005

Re: Lichenicolous Fungi UK Species List

Thank you Janet.
It is not really urgent, I'm just trying to keep my sources up-to-date.

Christine
by CJohnsonOHBR
Thu Mar 14, 2019 1:36 pm
Forum: Lichens
Topic: Lichenicolous Fungi UK Species List
Replies: 2
Views: 1005

Lichenicolous Fungi UK Species List

I am restructuring the [url=http://www.outerhebridesfungi.co.uk/]Fungi of the Outer Hebrides[url] website to incorporate new sections on lichenicolous fungi and lichens. I am aware of Hawksworth's publication The lichenicolous fungi of Great Britain and Ireland: an overview and annotated checklist p...