Mappp.co - Llwyn y Coed

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Habitats

Description

Description A small grazed sessile oakwood of the Teucrium scorodonia – Quercus/Betula (wood sage-oak/birch) type situated on a steep rocky north-east facing slope. The principle interest of the wood is its Atlantic flora which includes both British species of filmy ferns (Hymenophyllum wilsonii and H tunbrigense and an abundance of oceanic mosses, liverworts and lichens. It is one of the most important woodland sites in North Gwynedd for its woodland Atlantic bryophyte flora which includes the mosses, Grimmia hartmanii and Hyphen callichroun, and the liverworts, Adelanthus decipiens, Aphanolejeunea microscopica, Drepanolejeunea hamatifolia and Jubula hutchinsiae. The continuity of a broadleaved tree cover on this ancient woodland site has helped this flora to survive. The woodland canopy is dominated by oak Quercus petraea with occasional birch Betula sp. whilst the understorey is characterised by hazel Corylus avellana and mountain ash Sorbus aucuparia. The acidic ground flora is dominated by more widespread bryophytes such as Dicranum scoparium, Mnium hornum, Plagiochila asplenioides, Plagiothecium undulatum and Rhytidiadelphus loreus. Herb species are rare, however, except along the streamlines. The climbers, ivy Hedera helix and honeysuckle Lonicera periclymenum, are locally abundant on the trees.

Species mentioned

Show the 16 species mentioned in the description, with red-list status

English name search for this in other sites	Latin name search with Google	IUCN / Red List	Type	Family
Wilson's filmy-fern	Hymenophyllum wilsonii	VU	fern	hymenophyllaceae
honeysuckle	Lonicera periclymenum	LC	herb	caprifoliaceae
wood sage	Teucrium scorodonia	LC	herb	lamiaceae
deceptive featherwort	Adelanthus decipiens	Not listed in GB list	liverwort	jungermanniales
long leaved pouncewort	Aphanolejeunea microscopica	Not listed in GB list	liverwort	jungermanniales
toothed pouncewort	Drepanolejeunea hamatifolia	LC	liverwort	jungermanniales
Hutchin's hollywort	Jubula hutchinsiae	LC	liverwort	jungermanniales
greater featherwort	Plagiochila asplenioides	LC	liverwort	jungermanniales
broom fork moss	Dicranum scoparium	LC	moss	dicranales
swan necked thyme moss	Mnium hornum	LC	moss	bryales
waved silk moss	Plagiothecium undulatum	LC	moss	hypnales
little shaggy moss	Rhytidiadelphus loreus	LC	moss	hypnales
hazel	Corylus avellana	LC	tree	corylaceae
sessile or durmast oak	Quercus petraea	LC	tree	fagaceae
rowan	Sorbus aucuparia	LC	tree	rosaceae
ivy	Hedera helix	LC	woody climber	araliaceae

Insects to look out for

These moths, butterflies and beetles are known to feed on plants recorded at this site, and carry a notable UK conservation status — but a host-plant being present doesn't mean the insect has actually been recorded here. Treat this as "worth watching for," not a confirmed sighting.

Species	Status	Via host-plant
Oak lutestring Cymatophorina diluta	Endangered	Quercus petraea
Heath fritillary Melitaea athalia	Endangered	Teucrium scorodonia
Scarce vapourer Orgyia recens	Endangered	Corylus avellana, Quercus spp.
The sprawler Asteroscopus sphinx	Vulnerable	Corylus avellana, Quercus spp.
Mottled umber Erannis defoliaria	Vulnerable	Corylus avellana, Lonicera periclymenum, Quercus spp., Sorbus aucuparia
Marsh fritillary Euphydryas aurinia	Vulnerable	Lonicera periclymenum
White admiral Limenitis camilla	Vulnerable	Lonicera periclymenum
The lackey Malacosoma neustria	Vulnerable	Corylus avellana, Quercus spp.
Pale brindled Phigalia pilosaria	Vulnerable	Corylus avellana, Quercus spp.
Early moth Theria primaria	Vulnerable	Quercus spp.
Pale eggar Trichiura crataegi	Vulnerable	Corylus avellana, Quercus spp.
Oak hook-tip Watsonalla binaria	Vulnerable	Quercus petraea
Flounced chestnut Agrochola helvola	Near Threatened	Quercus spp.
Garden tiger Arctia caja	Near Threatened	Sorbus aucuparia
Large thorn Ennomos autumnaria	Near Threatened	Corylus avellana, Quercus spp.
September thorn Ennomos erosaria	Near Threatened	Quercus spp.
Double dart Graphiphora augur	Near Threatened	Quercus spp.
Clay fan-foot Paracolax tristalis	Near Threatened	Quercus spp.
Frosted green Polyploca ridens	Near Threatened	Quercus petraea

Host-plant data: Cook et al. (2025), Traits data for the butterflies and macro-moths of Great Britain and Ireland, 2024, UK Centre for Ecology & Hydrology / Butterfly Conservation; and Padovani et al. (2020), Database of Insects and their Food Plants (DBIF), UK Centre for Ecology & Hydrology (both Open Government Licence). Contains data supplied by UK Centre for Ecology & Hydrology.