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Bryophyte Trip report

Black Beck wood bryophyte trip report 15 December 24

Our December meet took place on a drizzly but mild December day at Black Beck Woods, an area of privately owned conservation woodland in the south lakes near Bouth (previously owned by the ‘Booth’ family in fact!). Due to the size of the site, we initially met just off the A590 to then travel in fewer vehicles along the smaller roads and access tracks to the starting location. We saw a record-breaking number of group members attend, meaning Kerry had the tricky logistical job of herding 20+ bryologists and lichenologists into cars so that we could get started in a timely fashion.

Black Beck woods is owned by Edward Mills, a woodland manager with a keen interest in using practical conservation and restoration methods to create a high-quality woodland in the temperate rainforest zone. Ed gave us a great introduction to the site and provided a plan for the day so that the group could prioritise visits to the most interesting parts of the woodland.

This was a rare occasion where the bryophyte and lichen groups stayed within view for much of the day, ambling up the woody slope from the access path to find our respective treasures. While Paul gave a beginner’s group an invaluable introduction to common acid species such as Pseudoscleropodium purum and Polytrichum formosum, others set out in hopeful anticipation of the oceanic indicator species found in many similar sites in the area. To our joy, we were able to quickly locate sizable patches of Bazzania trilobata alongside regular findings of associates Plagiochila spinulosa and Saccogyna viticulosa, all great indicators of healthier oceanic woodland.  

We headed through the woodland to a locally known ravine called ‘Scholar’s Gap’, a perfect damp, shaded rocky habitat for humid-loving species with locally rare Tilia cordata (Small Leaved Lime) growing from the crags. Here we discovered many of the same oceanic indicators (a good sign of a consistently high-quality site), as well as some wonderful hummocks of Leucobryum glaucum poking out between the rocks. The find of the morning, however, was of course Andy’s delightful discovery of Syzygiella autumnalis (previously known as Jamesoniella autumnalis) on a shaded rockface right at the bottom of the ravine slope.

We were able to meet up with the Lichen group for lunch, enjoying a chat about morning finds along the banks of the Rusland Pool at the southeastern side of the site. The afternoon saw us exploring a willow carr at the south end of the site, just off the public footpath at Fish House Bridge. Although we were still close to the craggy acid woodland from the morning, this wet woodland habitat provides very different conditions for new species discoveries. The flushing of water brings in a more base-rich influence, meaning common indicator species such as Calliergonella cuspidata and Sphagnum auriculatum started to appear. There were also many epiphytes within ID availability on the sprawling willows, and those with wellies were able to access species such as Frullania tamarsicum, Bryoerythrophyllum recurvirostrum, and Neckera crispa. Between the trees on the boggy woodland floor, Sue’s keen eyes spotted the shiny leaves of Hookeria lucens, a lovely flat-leaved moss that impersonates a liverwort at first glance.

The site sports a well-maintained boardwalk to host the public right of way, allowing us good access to the more inundated areas and perfect habitat for Trichocolea tomentella, the wonderfully named ‘Handsome Woollywort’ that was growing in abundant tussocks in perfect view. These wet areas were also great for Sphagnum, and our finalcount totalled at eight,which shows great diversity at the site.

While the day was already overflowing with species, there was one habitat we were yet to explore: deadwood! Luckily for us, there were conveniently placed logs all along the boardwalk that finally allowed us to tick off some classic deadwood species such as Odontoschisma denudatum, Cephalozia lunulifolia and Lophozia ventricosa.

Overall, the site turned out to be full of surprises, and although it currently has no SSSI designation there is hope that recording such as ours can start to create a better picture of the quality of the site in the future. Thanks to everyone that attended and to Kerry and Ed for organising the day. See you in January and happy holidays to all those who celebrate!

Text: Josie Niemira
Photos: various

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Lichen Trip report

Black Beck wood lichen trip report 15 December 24

This was a popular meeting with 11 people looking at lichens and even more at bryophytes. We car-shared to a point where a few vehicles could park at the edge of the wood and Edward Mills, the owner, gave a brief introduction. He bought the wood in 2020 and is aiming to create a mosaic of different habitats. Management includes coppicing in some areas but there are large old hazel trees too which will be retained. Deer, both roe and red, are a problem currently, limiting natural regeneration.

As you might imagine for a low-lying site (c 30m above sea level at the high points), it’s very damp underfoot with recent rain also having wetted every surface. Some lichens were doing very well in these circumstances – the first thing seen after only a few metres were stunning sheets of Baeomyces rufus covered in a sward of tiny mushroom-like fruiting bodies on exposed rock by the track. Here too we started to examine the trunks and twigs of nearby willow, birch and alder, finding various common lichens – bitter-tasting Lepra amara, Evernia prunastri pretending to be a fruticose lichen, various Hypotrachyna spp and Platismatia glauca amongst others. Further on there were oak trees on drier ground where Micarea alabastrites and Pachyphiale carneola were spotted by Allan, with Normandina pulchella and Peltigera praetextata found by Chris.

This first part of the wood was fairly dark which might account for the limited range of lichens. Further on we began to see hazel trees which overall had a good range of crustose species, especially lirellate ones (with scribble-like fruiting bodies). The best of these were in the southern part of the wood where it was more open and well-lit. Here we found red-pink pruinose Coniocarpon cinnabarinum, Coniocarpon cuspidans with immersed purple lirellae, Arthonia didyma with tiny fleck-like apothecia and Opegrapha niveoatra, as well as Graphis scripta sensu stricto. Some of these were checked under the microscope later. Throughout, on mature oak, there was a lot of Diarthonis spadicea (was Arthonia) with “arthonioid” round apothecia with blurry edges. Another nice find was the glue fungus, Hymenochaete corrugata, which bonds dead branches and twigs together above ground, so avoiding competition from other fungi.

Lunch was on the bank of the tidal Rusland Pool watercourse where there were also a few species on the wooden rails of the bridge and on a gate. These included Fuscidea lightfootii, Micarea lignaria and Candelariella vitellina.

After this we cut back across the denser wood but found several canopy species where an oak had fallen allowing us to look at the topmost twigs. Here there was Usnea subfloridana, a genus which likes lots of light so lives in the canopy until a storm brings it down to our level. Nearby rock outcrops had several nice crustose species, including pink-orange sorediate Gyrographa gyrocarpa growing with purple-brown Enterographa zonata with pale soredia, forming mosaics.

The centre of the wood has some established rhododendron which looked as though it was in the process of being tackled. Holly was frequent in the wood, a tree lichenologists tend to dislike as it casts year-long dense shade on adjacent trunks, badly affecting lichens there. On the other hand old holly trees are lovely and support good lichens. Xanthoria parietina was scarce, seen only once, which is a good thing.

As usual we had a good time with lots of lichen chat and looking at nice things in a wood new to us.

Text: Caz Walker
Photos: Chris Cant, Caz Walker

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Bryophyte Trip report

Legburthwaite bryophyte trip report 15 November 24

We started the field meeting at a small lay-by in Legburthwaite with a good turnout of around 10 bryologists. A last-minute illness meant our group lead was unfortunately unable to attend, but we still set off up the trail to High Rigg with a hopeful outlook on a drizzly but mild November day.

A brief hike up the path to Wren Crag brought us into monad NY3120 where we started our species recording on a rocky slope, finding many common upland species including Polytrichum alpinum, Orthocaulis floerkei, and Pogonatum urnigerum. There were signs of oceanic climate indicators in the rocky outcrops and sheltered crevices, particularly the liverworts Scapania gracilis and the more restricted Orthocaulis atlantica, distinguished from the aforementioned O. floerkei by the presence of red gemmae. Other liverworts here included both Lophozia excisa (with red gemmae and abundant perianths) and Lophozia sudetica (with many brownish gemmae and eroded leaves on gemmiferous shoots). The moss Leptodontium flexifolium caused some confusion. It looked rather like a Pohlia and was only identified under the microscope from its very papillose cells and large marginal teeth. It occurred in two forms in two different locations on the site: one small, looking rather like a Barbula species, and the other with more drawn-out shoots and deciduous bulbiform branchlets looking rather like Pohlia bulbils. It is fairly common in such acid habitats as this but we may be tending to overlook it as a Barbula.  

After an ambling climb uphill, we decided to pick up the pace and push further into the centre of the monad towards some promising mires and pools surrounding the High Rigg trail. While many distracting crags were found along the way, the wet heaths provided some great common acid indicator species such as Pleurozium schreberi and Hylocomium splendens. As we headed down into the mire, the species composition suggested a base enrichment entering via the springs and flushes in the area, and the Sphagnum species composition highlighted this variance nicely. The group quickly totalled up thirteen species of sphagnum, including Sphagnum russowii, S. girgensohnii, and S. auriculatum in good numbers in the base-enriched areas. The base influence was also supported by further discoveries of Calliergon giganteum around a pool and Hypnum cupressiforme var. lacunosum appearing on the surrounding slopes and scree.

After a quick stop for lunch the group decided to head back down the path to enter the monad from a lower location via a riverside path. Here a few of our members parted ways and a smaller group headed out to explore the lightly wooded scree slopes on the east-facing side of Wren Crag.

The find of the day was Ptilium crista-castrensis which appeared in surprisingly large numbers across the slope, with several well-established patches discovered during the afternoon. Spirits were further raised by the discovery of the western species Frullania fragifolia, an almost-black liverwort that lives up to its name; the fragile leaves practically fall off in your hands!

Overall, we recorded 107 species of bryophyte, and the site provided a good variety of different habitats to reinforce upland species learning. With many beginners on this trip, it provided a great opportunity for knowledge sharing and conversations around how and why our species form different distributions in the uplands and in microhabitats. Thanks to everyone that attended and contributed to species recording!

Text: Josie Niemira
Photos: Josie Niemira

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Bryophyte Trip report

Leck Beck bryophyte trip report 30th June 2024

A small group (Clare Shaw, Kerry Milligan, Paul Ross, Judith Allinson, David Shaw) met at a parking layby on Leck Fell, just before Leck Fell House. We then trekked down the fell towards the beck, through deep heather and bracken, aiming for the less steep access point upstream of Ease Gill Kirk. The stream bed was totally dry, as the area is limestone and full of pot holes and sink holes, so the water drains away for long stretches.

In the overhand of a bank above the beck, Paul found a lovely patch of very fertile Seligeria recurvata, which we all admired. Rocks in and by the beck had Barbilophozia barbata and Barbilophozia atlantica with its distinctive red gemmae. A Grimmia growing on limestone, which seemed a candidate for G. dissimulata, turned out to be G. trichophylla.

We descended the beck into Ease Gill Kirk. Wet rock faces had abundant Chiloscyphus polyanthos, while a large boulder in the beck had Encalypta vulgaris (sadly without capsules) and a reddish Mnium marginatum.

A rock face and steep slope above the beck just upstream of Ease Gill Kirk had Marchesinia Mackai and Orthothecium intricatum, with Gymnostomum aeruginosum and Trichostomum crispulum and T. brachydontium at the base.

Judith and I left after lunch for the long-seeming trek back to the car across the difficult ground, but now with a steep uphill gradient to contend with.

After lunch a few more species were added to the list, including Dicranella rufescens and Metzgeria pubescens, adding up to a very respectable 98 species altogether.

Text: Clare Shaw

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Bryophyte Trip report

Alcock Tarn bryophyte trip report 16 July 2024

Peter Bullard and I met up with a larger group of lichenologists for our field trip to Alcock Tarn. Parking in free parking areas in quarries on the minor road above the A592, we walked up the road and were soon climbing in sunshine on a good track. Alcock Tarn is at the far end of the monad, so we had a whole monad of footpath and surrounding areas to record in a single recording sheet, always something of a relief. We soon stopped to admire lichens and bryophytes on small rock faces by the track, including Bryum capillare, Orthocaulis floerkei, Andreaea rupestris, Racomitrium fasciculare and Racomitrium heterostichum. The track itself had good quantities of Polytrichum piliferum, with its distinctive hyaline hair point, and small Oligotrichum hercyanum, quite a common moss but restricted to acid soils in upland districts, where it is often seen on footpaths and tracks. Always lovely to see, it is clearly recognisable under a hand lens by its frilled ruff of wavy ridges (lamellae), often hiding within the inrolled margins of the leaf. In the same family, we later found Pogonatum aloides and Pogonatum urnigerum, which was a good opportunity to compare the features of the different species.

The lichenologists were having a lengthy tutorial session, so Peter and I decided to move on up the track. We found further boulders and rock faces, with an interesting small, dark Marsupella emarginata, which we speculated might be var pearsonii. Sadly, later examination suggested that the commoner (even ubiquitous) var. emarginata was more likely, as the pigment was dark brown without clearly reddish tints, and there was no sign of any apiculate lobes. The same rock did however have a nice example of Scapania compacta and Andreaea rothii.

Higher up, the path crossed a small beck which provided some good bryophyte habitats. Where the beck went under the bridge there was plenty of golden Sciuro-hypnum plumosum, Hygrohypnum luridum with abundant sporophytes and Rhynchostegium riparioides. Further down the beck was Chiloscyphus polyanthos s.l. a lovely patch of shiny Bryum julaceum on a rock, while an old tree had Lejeunea lamacerina, Metzgeria furcata and Frullania dilatata. At this point we were joined by Georgia Stephens, the new Rainforest advisor with Plantlife, who had come to learn more about bryophytes in the region, so we ran through some of our finds and headed up to the tarn, where we stopped for lunch.

The tarn was enlarged in the 19th century with a stone and earth dam and has a fair amount of infrastructure, including a concrete outlet. This had abundant golden Sciuro-hypnum plumosum, while in the wetter parts at the base we found Dichodontium flavescens, Pellia epiphylla, Conocephalum conicum, and a small Fissidens which turned out to be Fissidens bryoides. There was a boggy area around beck exiting the tarn, which we scoured for Sphagnum. We eventually found a few patches by the beck, and went through the Sphagnum Field Guide key, identifying S. palustre, S. rubellum and S. subnitens, growing with Aulacomnium palustre. Among the hummocks of molinia we also found Calypogeia arguta and Plagiomnium elatum.

The afternoon was wearing on so we headed back to the car, meeting some lichenologists on the way. We didn’t have a very long list, but we’d had a very pleasant afternoon and done a lot of useful revision and consolidation!

Text: Clare Shaw
Photos: Clare Shaw and Peter Bullard

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Lichen Trip report

High Rigg, south end – Wren Crag lichen trip report – 15 November 2024

We had a good turnout despite a dreich weather forecast – in the end it was chilly and gloomy but largely dry, with the lichens damp but not underwater. About 15 people, both bryologists and lichenologists, met at Legburthwaite at the north end of Thirlmere from where a short walk along the busy road took us to the southern nose of High Rigg. This is a low N-S ridge formed of andesite, an igneous rock which can sometimes contain alkaline minerals, adding some variety to the frequently acidic upland rock – although we didn’t see any species indicating this.

The southern monad NY3119 already contained 43 records so we didn’t write down everything we saw, whereas the next monad to the north NY3120 only showed 3 lichen records. Our aim was to reach that in order to expand on the lichen knowledge for that square. In the end we made a list of 35-40 lichens for the northern monad which isn’t bad given that there was a lot of lichen chatting to distract us from recording.

As usual it was slow going as every rock and tree had the potential for lengthy discussions. Now and then we got cold and needed a brisk walk on to the next feature. Heading up hill we came across lots of hopeful oak seedlings as well as mature trees which had a range of typical acid bark lichens, such as bushy Evernia prunastri and red-fruited Cladonia polydactyla. Further up there were scattered pine with small grey lobes of foliose Parmeliopsis hyperopta. Also on pine was Hypocenomyce scalaris another acid-bark species, made up of little downward pointing scales with a sorediate rim, going a delicious C+red.

A large isolated boulder had a good range of crustose species, such as Trapelia glebulosaImmersaria athroocarpa and Lepra corallina, as well as sheets of Lasallia pustulata forming a warted leafy mass. Here too were the charismatic fruticose Stereocaulon evolutum (KC+violet and Pd-) and S vesuvianum. Peter looked underneath and found orangey Gyrographa gyrocarpa where it would be drier, as well as Pertusaria amara on the top of the rock, confirmed by tasting (it’s very bitter). This is usually on bark.

As we got higher there were more rocky outcrops which began to show a nice range of upland species – Ophioparma ventosa with red apothecia, yellow granules of Candelariella coralliza where birds perch, lots of leafy grey Parmelia saxatilis and a range of terricolous Cladonia species. There was also the less common Stereocaulon vesuvianum var nodulosum which has blobs of soredia at the top of the podetia. At our furthest point Chris spotted several thalli of the terricolous placodioid lichen Baeomyces placophyllus. This looks similar to the commoner Baeomyces rufus in colour but forms distinct lobes around the edge of a rosette. On the surface are schizidia, convex propagules where the cortex has peeled up forming scales. A lengthy discussion arose about this…

As ever, the adjacent drystone wall produced interesting finds. Peter spotted an LF (lichenicolous fungus, ie a fungus that lives on or in a lichen) on Parmelia saxatilis which turned out to be Nesolechia oxyspora, new to Cumbria and the north of England. Nearby on the north-facing side of the wall was Psoronactis dilleniana, a mauve-grey pruinose crust with dark apothecia.

Liz spotted a bonus species earlier in the day – Ceratiomyxa fruticulosa, a slime mould, on the upturned root plate of a fallen tree.

Other LFs seen were red-pink patches of Marchandiomyces corallinus on Parmelia and, earlier in the day, Zyzygomyces physciacearum on Physcia aipolia – or was it? It was later confirmed as the rarer Zyzygomyces aipoliae which has recently been separated from Z physciacearum. These used to be in the Heterocephalacria genus. Anyone coping with reading this paragraph deserves a prize….

Walking back didn’t take very long. After a final look at a quantity of Peltigera praetextata on the mossy wall at the road we headed back to the cars.

Thanks to Pete Martin for organising the trip which he was unable to attend.

Text: Caz Walker
Photos: Chris Cant, Peter Bisset, Caz Walker

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Lichen Trip report

Scales Wood lichen trip report – 20 October 2024

Scales Wood sits on the steep north-east facing slopes opposite Buttermere village. It’s a marvellous place, the SSSI citation describes it as having “the best and most extensive example in the Lake District of a lichen community typical of upland, high rainfall oakwoods such as those found in the Scottish Highlands”. For some of us,  it was our third visit and it nearly didn’t happen.

Storm Ashley made us look carefully at the weather maps. The rain was forecast to stop between 10 and 11 o’clock. So we pushed back the start time. The strongest winds were later on, and maybe we’d be sheltered by the fells. Indeed, as we eight lichen botherers gathered at the foot of the Newlands Road it really wasn’t very windy at all. But it was bucketing down. Morale sank as we waded along the ankle-deep river oops, sorry, path towards the bridge.

But the rain soon stopped, and it was almost pleasant as we wandered along the bottom of the wood, discussing Peltigera membranacea (bullate, tomentose, downturned lobes and long separate rhizines), Hypogymnia physodes (soredia on splayed hollow lobe ends) and Parmelia saxatilis ( linear pseudocyphellae and isidia). A ninth member of the party joined us. There was a selection of Pertusaria species to compare: amara (bitter),  corallina (isidiate) and pertusa (pepperpot-style apothecial warts). It didn’t seem right to mention that the first two have now changed genus to Lepra

We had lunch by a holly at the northwest end of the wood, and then began the climb up alongside a beck. To no-one’s surprise, we didn’t go very fast or get very far. There were Punctelia pseudocyphellae to look at (dot-like, rather than linear) and a good array of the upland rainforest specialities: Hypotrachyna laevigata with its smooth, clean-cut lobes; Sphaerophorus globosus the coral lichen, Mycoblastus sanguinarius with red patches under the apothecia. There were Micarea alabastrites and M. cinerea. A little Cetrelia olivetorum was found on a fallen oak with its longer pseudocyphellae and bare undersides near the lobe edges.

The star of the show, as ever in Scales Wood, was Hypotrachyna (until recently Parmelinopsis) horrescens. It’s a small, leafy thing, with isidia and cilia (hairs) on the surface. It looks like a diminutive version of Parmotrema crinitum, so I think of it as Desperate Dan’s little brother.  It’s not quite on every tree, but there’s a lot of it in Scales Wood. What’s odd is that this is the most northerly known population. It’s only been found in one other Lakeland wood, and the main areas of it in Britain are north Wales, the New Forest and the south west. I wonder if a concerted hunt across these western valleys would reveal any more?

We also saw the yellowish crust Lecanora alboflavida on birch, not recorded at this wood before, although it is nearby in Ennerdale. Also new to this site was Schismatomma umbrinum, a brown granular crust which likes sheltered rocks in old woodland.

I also wonder if Lobarina scrobiculata is still here in Scales Wood. It was last seen in 1961. So it’s hard to imagine it has survived. But it’s quite a big wood, not easy to move around, and after three visits I feel like we have barely scratched the surface. So maybe, just maybe… oh we’ll have to come back for a fourth visit!

Text: Pete Martin
Photos: Pete Martin, Chris Cant

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Lichen Trip report

Lodore lichen trip report – 19 September 2024

Arriving early to avoid hold-ups from roadworks at Threlkeld we found the car park by Derwent Water almost empty.  It quickly filled with lichenologists and bryologists all having had the same idea. Car parking for non-NT members is now restricted to 4 hours but luckily sufficient membership cards were produced (thanks, Pete) for us all to stay all day. There was still an early morning chill to the air but the clear blue sky presaged another dry, warm day to come, in this brief but welcome period of high-pressure.

First find of the day was down by the lakeside where Caz had seen a small inconspicuous piece of Sticta limbata on willow. Crossing the road from the car park our party of eight lichenologists followed rather more slowly in the steps of the bryologists who were more focussed on reaching the beck and falls behind the Lodore Hotel. There was plenty of interest along the path which wound along the base of the steep hillside through mainly sessile oak, elm and ash SSSI woods, where we found plenty of luxuriant Peltigera spp. on tree trunks and mossy boulders, various Pertusaria spp, Coniocarpon cinnabarinum, C. cuspidans (previously Arthonia elegans, one of the species that has changed both generic and specific names – annotate your Dobson!), Mycoblastus sanguinarius or bloody heart lichen and Normandina pulchella aptly given the common name, elf-ears. A highlight for me was Pete’s description of the orange, dark-rimmed apothecia on Pachyphiale carneola as iron-bru jelly sweets and his tip for remembering the latin name as ‘elephant flesh’ (it worked for me!). Graphis spp were much in evidence, G. pulverulenta and G. personii as well as G. scripta s.str. on hazel.

A bit further on, we crossed into the second monad of the day and began another list. Perhaps directed by a shaft of sunlight on a tree trunk, we found Parmotrema crinitum, which Pete memorably calls Desperate Dan because of its black whiskers. A few yards further on was our lunch-spot, the sunny viewpoint at the bottom of the Lodore falls from where we espied the bryologists picnicking in their natural habitat of shade, amongst the spray-splashed rocks in the streambed below us. It would have been easy to be lulled into a post-prandial nap by the soothing sound of the cascading water and the warm sunshine but instead we set off again, this time upwards, scrambling up a steep path over slippery scree and tree roots which led up high above the beck. Here we discovered some more, interesting specimens such as Pannaria conoplea, a diminutive foliose species on a horizontal but still living larch and a filamentous species on vertical rock probably Cystocoleus ebeneus. Wood ants were out and about, if you rested your hand on a larch it was soon discovered and discouraged. A large nest at the base of one of the larches on the slope was alive with ant activity.

By mid-afternoon we felt we’d gone as far as we wanted and retraced our steps downhill, catching tantalising glimpses of the placid lake waters which looked invitingly cool in the hot afternoon sun. Down at the falls where it was shaded and several degrees cooler, jelly lichens Scytinium lichenoides and Leptogium cyanescens were living amongst the moss. We recorded Sticta sylvatica but looking carefully at the photos, at least some of it was the much rarer S. ciliata. Tiny but exquisite mosaic-forming Enterographa hutchinsiae was colonising flat pebbles. When we eventually returned to our cars, the car park had emptied and a few hardy souls were swimming in the lake but none of our party were tempted in!

Microscopic study of small samples taken home brought up more surprises, see the discussions on our Facebook pageToniopsis (Bacidia) inornata was found, also on a pebble, and the first record for England. A putative Bacidia had spores that were much too short and has been confirmed as Lecania chlorotiza which has ‘near threatened’ status, whilst what we thought might be Catinaria atropurpurea had spores that were much too long and could be Bacidia absistens.

Text: Liz and Peter Bisset
Photos: Peter Bisset, Chris Cant, Pete Martin, Paul Hanson, Caz Walker

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Lichen Trip report

Lamps Moss lichen trip report – 24 August 2024

We seem to be making a habit of exploring borderlands, this time again at the Cumbria-Yorkshire boundary in the uplands to the south east of Kirkby Stephen: Lamps Moss, south of Nine Standards Rigg. It’s an interesting spot with both acidic peat hag habitat and gritstone rock adjacent to limestone pavement and sinkholes. As a result we saw a good selection of lichens which prefer these different niches. The site is part of the Mallerstang-Swaledale SSSI.

At over 500m this is an exposed site so the trip was nearly cancelled due to ongoing stormy weather. However a window of dryness after a later than usual start time meant we avoided the rain.

First we looked at the peat hags north of the road, commenting about the lack of lichens in the sward – not even much Cladonia portentosa was to be had. Dwarf shrubs such as heather, bilberry, crowberry and cranberry were there, however, so past management might be the explanation. However, on low exposed peat banks there was a range of Cladonia species – red-fruited C bellidiflora and C diversa, brown-fruited C ramulosa and spiky C furcata. The basal squamules of Lichenomphalia hudsoniana and the gelatinous green thalline bobbles of L umbellifera (now L ericetorum) were here too. A fuzz of yellow-brown granules on horizontal peat seemed a candidate for Placynthiella dasaea and a specimen was taken to torture once it had dried out – applying chemicals to sodden lichens doesn’t work. It turned out to be C+red with green algae of the right size, hopefully confirming it as P dasaea.

There have been attempts to restore some of the areas of bare peat by blocking channels and spreading cut heather on unvegetated ground – this may help mosses but will kill any lichens growing here and indeed very little was seen at these spots.

A long-discarded crisp bag deep in the Sphagnum turned out to be a sexton beetle graveyard where maybe 30 of them had been attracted to their deaths by the strong smell of earlier rotting beetles.

We went back to the carpark for lunch and to meet further participants. This allowed for the examination of several concrete posts which had a good covering of crustose and a few foliose lichens, including unusually fertile Physcia caesia.

A short walk further west took us into the next monad where we looked at terricolous and saxicolous lichens on limestone. There was green Peltigera leucophlebia dotted with brown cephalodia, P polydactylon with brown veins on the underside that come to the lobe edge and P canina showing bushy, confluent rhizines beneath. The intriguing Diploschistes muscorum was consuming a Cladonia victim nearby by overgrowing it and pinching its algae. The star find on limestone was Sagiolechia protuberans, a rare species with 4 previous records in Cumbria. This had black star-shaped apothecia on a slightly orange thallus. Nearby there were the immersed pink apothecia of Hymenelia prevostii (green alga so the thallus scratches green) and further on Hymenelia epulotica (Trentepohlia as photobiont so scratches yellow/orange). Other good finds included Solorina saccata amongst moss in a sheltered sinkhole, Bryobilimbia hypnorum and Arthonia calcarea, as well as the usual suspects Gyalecta jenensis (now Secoliga jenensis), Protoblastenia rupestris and P incrustans plus assorted jelly lichens. Pete had a specimen which may turn out to be a Staurothele species – tbc.

Before driving off, Judith found a beautiful Lecanora intricata with wrinkled areoles and flexuose apothecial margins on the sandstone capstone of the YDNP sign by the road.

Text: Caz Walker
Photos: Chris Cant, Pete Martin, Judith Allinson

Categories
Lichen Trip report

Alcock Tarn lichen trip report – 16 July 2024

A slow climb to Alcock Tarn.

Mid July and I feared that the central Lakes would be very busy;  have no parking; experience torrential downpours and be full of biting insects. But none of these were true for our Alcock Tarn trip!

In a break with tradition, we didn’t get distracted on our journey from meeting point to target area. Well, that’s not quite true. As we ascended out of Bracken Fell woods we succumbed to the lure of an outcrop. It was the ideal place to outline lichen basics to the newcomers: there was Lepra corallina, Rhizocarpon geographicum, Stereocaulon vesuvianum and Ophioparma ventosa. Some Cladonias too. It was a good half hour before we moved on up the zigzags. There was a boulder with Ephebe lanata on it. And an emerging dragonfly to examine: a female Southern Hawker (Aeshna cyanea) I think.

But we quickly found another outcrop to distract us, and an oak tree with Normandina pulchella. By the time we’d examined a hawthorn with a wide variety of foliose species and particularly nice “dancing” Pseudevernia furfuracea it was time for lunch. On the crag nearby was the bright yellow Arthrorhaphis citrinella.

After a break, our slow ascent continued. An impressive metal pipe boasted a number of metalliferous lichens: Placopsis lambii, Rhizocarpon oederi, Scoliciosporum umbrinum, Stereocaulon pileatum (“fuzzy headed Fisher Price” people as Rebecca Yahr once described them) and Ionaspis lacustris.

To our surprise, we caught up with the bryophyte party ( but only briefly). Ash limbs had impressive Platismatia glauca (frilly lettuce) and Parmelina pastillifera. The jelly lichens on a boulder in the beck- Collema glebulentum and Scytinium pulvinatum– maybe suggested a basic influence.

On the move again we found Lichenomphalia ericetorum on an old stump base- and L. hudsoniana too. Bird perches had piles of bones: and Candelariella vitellina; flat outcrops had Sphaerophorous fragilis, the first Acarospora fuscata of the day and pruinose blisters of Lasallia pustulata.

A final push brought us to the tarn. There were Mallards, Water Horsetail and Lesser Spearwort, together with impressive views. But somehow, having reached the goal, we didn’t have any desire to push on. Would there be more at Butter Crags? We’ll have to leave that for another day. Needless to say, it didn’t take very long to descend at all. But we had found nearly 100 species on our slow climb…

Text: Pete Martin
Photos: Pete Martin, Chris Cant, Paul Hanson