#Fuscidea
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aspenecology.com
3/3 …fluoresces UV+ light blue from divaricatic acid! That said, sister species and 'dreaded GSC' F pusilla does too, and it looks otherwise identical to sterile F lightfootii. But F pusilla tends to form small (<10mm) orbicular thalli. Larger thalli like this one are best recorded as F lightfootii.
Fuscidea lightfootii : Scotland : VC97 West Inverness-shire : NM7292 Bracorina : August 2025 : On Quercus twig : UV+ light blue
September 14, 2025 at 7:37 PM
aspenecology.com
2/3 …because they're all quite similar and often tricky to identify. F lightfootii is perhaps most easily confused with Lecanora compallens, which is less common, but which also reacts negative to all chemical spot-tests. But unlike L compallens and almost all other 'dreaded GSCs', F lightfootii…
Fuscidea lightfootii : Scotland : VC97 West Inverness-shire : NM7292 Bracorina : August 2025 : On Quercus twig
September 14, 2025 at 7:37 PM
aspenecology.com
1/3 This is Fuscidea lightfootii from Bracorina, Loch Morar, Scotland. First for hectad NM79. Normally fertile, it's sometimes found infertile as here, with soredia (powdery vegetative propagules) only. In this state, it's easy to confuse with other 'dreaded green sorediate crusts': dreaded…
Fuscidea lightfootii : Scotland : VC97 West Inverness-shire : NM7292 Bracorina : August 2025 : On Quercus twig
September 14, 2025 at 7:37 PM
sim-elliott.bsky.social
Fuscidea lightfootii and Flavoparmelia caperata on fallen cone of am introduced Monterey Pine, Pinus radiata. Ashburnham Park SSSI, High Weald, nr Battle.
August 20, 2025 at 10:15 PM
northernhills.bsky.social
Upland weathered fence posts are #lichen-rich with a wide range of species. Factors at play: exposure, usually well-lit, wood type and chemical treatment. Bird perching leads to manuring and an ornithocoprophilous lichen community. #lichengbi
Crustose, foliose and fruticose lichens on top of a weathered wooden gate post Fuscidea lightfootii Lecanora symmicta C- UV+orange Bird droppings with Xanthorion community including Candelariella vitellina and Xanthoria ucrainica
July 29, 2025 at 5:57 PM
geoffrey311.bsky.social
Exploring #lichens on the #Isle-of-Rona in #Scotland

Umbilicaria species grow on hard exposed rock in mountain environments. They are unusual foliose lichens since they are attached by a single, often central holdfast. I found two on Rona

Tap/click the caption to expand it
#lichenGBI #FungiFriends
A small reddish-brown multilobed thallus just over 2 cm wide (scale in mm). There were many of these small thalli dotted over the rocks at the top of Meall Acairseid ("Anchorage Hill") which at 125 m was the highest hill on Rona, overlooking the main harbour. This is Umbilicaria polyrhiza. The upper surface is smooth and plain. Black rhizines can be seen poking out around the margins and where there is any damage to the lobes. What are rhizines doing on a lichen which has a central holdfast? Well, they play no part in attaching the lichen to the rock, and so technically they are called "rhizinomorphs", structures in the form of rhizines. What role they may play in the life of this lichen, I have never heard. A larger example of Umbilicaria polyrhiza at 4 cm wide. The same plain, smooth upper surface to the lobes, but more of the black undersides with their black rhizinomorphs can be seen. A rather different Umbilicaria. This one was less frequently found, but it was again on the rocks of Meall Acairseid. This is Umbilicaria torrefacta. Its name come from the Latin word meaning to parch or roast, and refers to its very dark colour. This is a single-lobed lichen, though as you can see it is much crumpled. It can be identified from its torn margins and from a series of holes close to the margins. This gives the margins rather a lace-like appearance. Here are the two species growing next to each other on top of Meall Acairseid. Umbilicaria torrefacta is on the right, Umbilicaria polyrhiza on the left, with a further U. torrefacta on the far left. Notice on the U. torrefacta not only the crumpled nature of the lobe and the lace-like margin, but also the many apothecia growing on its upper surface. And notice the very complicated structure of the apothecia. Rather than a plain circular margin surrounding a disc, these apothecia have what's called a "gyrose" structure. The margin is folded back and forth several times across the disc, which is barely visible between the folds. See too how these Umbilicarias are able to grow over the crustose lichens coating the rock unopposed. As foliose lichens they can simply grow over the top of the crustose species. The one with yellow areoles is Rhizocarpon geographicum. The very pale brown one is Fuscidea cyathoides, both common crusose species on silicious rocks.
June 12, 2025 at 8:05 PM
axelvoldbarr.bsky.social
Ja, detta är på en sten. Din är väl på ett träd?

Absolut samma sorts lav tänker jag.

Klipplav, Fuscidea cyathoides
May 1, 2025 at 6:21 PM
wahlgrenniclas.bsky.social
Mitt tips är klipplav
Fuscidea cyathoides
March 2, 2025 at 5:42 PM
robyaxley.bsky.social
On birch bark at Kelling Heath - Normandina pulchella, Jamesiella anastomosans, Fuscidea lightfootii. And a fruiting Hypotrachyna, maybe afrorevoluta.
Normandina has neatly bordered squamulose lobes. Greyish area in centre is Jamesiella, which has minute pointed hypophores sticking up from the surface. Fuscidea is greenish in normal light, but ice-blue under UV. Very close pair of species, Hypotrachyna revoluta and afrorevoluta. The soredia are coarser on afro, and marginal lobes flattened.
February 15, 2025 at 5:46 PM
mothman60.bsky.social
On the lead work which we were replacing i noticed Physcia caesia and possibly Fuscidea lygaea 🙂 @larkinlichen.bsky.social
Physcia caesia on lead. Lichens living on lead. Fuscidea lygaea possibly, growing on lead !
February 6, 2025 at 9:27 AM
chriscant.bsky.social
Other lichen finds from our trip up to the disused Dufton lead mine include Peltigera neckeri, which likes lead-contaminated soil, and more common rock and heath species: Porpidia tuberculosa, Fuscidea kochiana and Cetraria islandica. #LichenGBI #lichens
Peltigera neckeri - if you look closely at the cracks the edges appear to be corticated over rather than a recent clean break. Some thalli had the characteristic dark fruit. It was a bit too damp to see the pruina which are always hard to see. Porpidia tuberculosa is one of the acid rock crusts that can appear purple - this species has soralia/soredia - while the other P lygaea doesn't. Fuscidea kochiana Cetraria islandica showing the tiny isidia projecting from the sides of the slightly channelled brown lobes.
January 31, 2025 at 11:08 PM
algreer.bsky.social
My favourite Fuscidea cyathoides stone, Cnoc Fola, Donegal.

I've photographed this stone for three years in a row. I keep meaning to put together a stop motion animation of the lichens!

#donegal #macro #biodiversity
#eire #lichen #crustoselichen #cnocfola #fuscideacyathoides #Fuscidea
January 2, 2025 at 7:16 AM
algreer.bsky.social
Fuscidea cyathoides, with it's warm mosaic in a cold windy place. Cnoc Fola, Donegal, August 2024

#donegal #macro #biodiversity
#eire #republicofireland #lichen #crustoselichen #mosaiclichen #cnocfola #bloodyforeland #gweedore #fuscideacyathoides #Fuscidea
Donegal, August 2024 Fuscidea cyathoides, with it's warm mosaic in a cold windy place. #donegal #macro #biodiversity #eire #republicofireland #lichen #crustoselichen #mosaiclichen #cnocfola #bloodyforeland #gweedore #fuscideacyathoides #Fuscidea
December 30, 2024 at 6:23 AM
robyaxley.bsky.social
Yes, it surprised me, especially when next to the blue of Fuscidea lightfootii. Photos may emerge!
December 28, 2024 at 6:24 PM
algreer.bsky.social
Another day, another lichen mosaic (Fuscidea cyathoides)

#donegal #macro #biodiversity #eire #lichen #crustoselichen #mosaiclichen #cnocfola #bloodyforeland #gweedore #fuscideacyathoides #Fuscidea #donegal
Another day, another lichen mosaic (Fuscidea cyathoides) #donegal #macro #biodiversity #eire #lichen #crustoselichen #mosaiclichen #cnocfola #bloodyforeland #gweedore #fuscideacyathoides #Fuscidea #donegal
December 27, 2024 at 6:55 AM
northernhills.bsky.social
The close up photo shows soralia so not Fuscidea lygaea. If the chemical tests are -ve it could be Porpidea tuberculosa. K/UV would help.
December 24, 2024 at 7:56 PM
jennysea.bsky.social
Fuscidea lygaea is a possibility
December 24, 2024 at 4:40 PM
algreer.bsky.social
Lichen mosaic made by Fuscidea cyathoides.

#donegal #macro #biodiversity #eire #lichen #crustoselichen #mosaiclichen #cnocfola #bloodyforeland #gweedore #fuscideacyathoides #Fuscidea
Lichen mosaic made by Fuscidea cyathoides. #donegal #macro #biodiversity #eire #lichen #crustoselichen #mosaiclichen #cnocfola #bloodyforeland #gweedore #fuscideacyathoides #Fuscidea
December 24, 2024 at 2:50 PM
algreer.bsky.social
More crustose mosaic lichens growing on the top of Cnoc Fola (Bloody Foreland). Likely to be Fuscidea cyathoides (many thanks to Di Napier fo the ID!)

#donegal #macro #eire #lichen #crustoselichen #mosaiclichen #cnocfola #bloodyforeland #gweedore #fuscideacyathoides #Fuscidea
More crustose mosaic lichens growing on the top of Cnoc Fola (Bloody Foreland). Likely to be Fuscidea cyathoides (many thanks to Di Napier fo the ID!) #donegal #macro #eire #lichen #crustoselichen #mosaiclichen #cnocfola #bloodyforeland #gweedore #fuscideacyathoides #Fuscidea
December 23, 2024 at 7:01 AM
larkinlichen.bsky.social
Could be wrong, but I think that lovely mousy-brown patchwork with black outlines is Fuscidea cyathoides
December 21, 2024 at 3:20 PM
peterbraubach.bsky.social
In my search for Fuscidea lightfootii (which as I understand has a more coarse thallus than Amandinea punctata) I came found this #lichen. Compared to the other Amandinea it had a coarser thallus. Microscopically I would say still Amandinea - but heavily colonized by al lichenicolous fungus.
Coarse green lichen thallus with small black apothecia Section with apothecia (in water) Apothecium with pigented 2-celled spores. Thallus of the lichen with brown hyphae of a lichenicolous fungus(?)
December 17, 2024 at 8:41 PM
peterbraubach.bsky.social
Thank you for this comprehensive writeup! I will keep looking for Fuscidea lightfootii and show once I found it.
December 16, 2024 at 12:26 PM
sueinscotland.bsky.social
5/5x To me the spores look 1 septate but the descriptions vary and it is a nightmare to key out to genus as spores can be colourless when young, brown when more mature, and some sources say simple and some say septate. But I do think it is Fuscidea lightfootii anyway 🙂
Spores in an ascus, dyed blue Small spore looking 1 septate, size 8x3 microns
December 16, 2024 at 12:10 PM
sueinscotland.bsky.social
3/5 Details of the thallus of Fuscidea lightfootii showing circular granular thallus with some granules producing soredia
Green granular thallus with black apothecia Edge of green thallus showing circular contour and soredia
December 16, 2024 at 12:01 PM
sueinscotland.bsky.social
2/5 Easy to tell the difference between Fuscidea lightfootii (UV+ white) and Lecidella elaeochroma (UV+orange) even though they are both green thalli with black lecideine apothecia
Pictures of lichens on twigs in normal light and UV
December 16, 2024 at 11:58 AM