Cobbler's Plain Meadows, Devauden

Site of Special Scientific Interest · 51.7096, -2.7661

Also within

Gwent County

Geology & landscape

Rock Type: Sandstone

Description

Description Cobbler's Plain Meadows are situated to the north of the village of Devauden at an altitude of between 120-190 metres. The underlying geology is lower Old Red Sandstone and the soils are classified as brown earths of the Milford and Eardiston 1 associations. The meadows are located on a steep western facing slope and are generally freely drained with local minor flushing. The site supports the largest areas in Gwent of a particular unimproved neutral grassland community type as well as plant species which are becoming scarce in the county and nationally. The western meadow supports relatively unimproved neutral grassland of the common knapweed -crested dog's tail Centaurea nigra - Cynosurus cristatus community. The site is unusual in that both these species are sparse here, but another key plant of this community, common bird's-foot-trefoil Lotus corniculatus, is abundant. The grassland is best referred to the Lathyrus pratensis (meadow vetchling) sub-community. The eastern meadow supports a wider range of communities including some grassland in the north west corner similar to the above. The upper part of the field, however, is more typical of an acidic community, the Festuca ovina - Agrostis capillaris - Galium saxatile (sheep's-fescue -common bent -heath bedstraw) grassland. Again, this is an unusual example of the community as sheep's-fescue and heath bedstraw are missing. Grassland in the lower part of the meadow has affinities with both communities and flushes with abundant small sedges are also present. The most frequent grasses throughout are common bent, sweet vernal-grass Anthoxanthum odoratum, red fescue Festuca rubra and Yorkshire-fog Holcus lanatus. Carnation sedge Carex panicea, glaucous sedge Carex flacca and flea sedge Carex pulicaris occur only in the flushes. Adder's-tongue Ophioglossum Vulgatumis present in both meadows. Herbs which are characteristic of unimproved grassland are well represented and include common spotted-orchid Dactylorhiza fuchsii, dyer's greenweed Genista tinctoria, fairy flax Linum Catharticum, yellow-rattle Rhinanthus minor and devil's-bit scabious Succisa pratensis. Also present in the eastern meadow are common twayblade Neottia ovata, green-winged orchid Anacamptis morio and hairy lady's-mantle Alchemilla filicaulis. Remarks: Adjoins Wye Valley Area of Outstanding Natural Beauty.

Species mentioned

English name
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Latin name
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IUCN / Red List Type Family
common bent Agrostis capillaris LC grass poaceae
sweet vernal grass Anthoxanthum odoratum LC grass poaceae
crested dog's tail Cynosurus cristatus LC grass poaceae
sheep's fescue Festuca ovina LC grass poaceae
red fescue Festuca rubra LC grass poaceae
Yorkshire fog Holcus lanatus LC grass poaceae
lady's mantle Alchemilla filicaulis VU herb rosaceae
green-winged orchid Anacamptis morio NT herb orchidaceae
black knapweed Centaurea nigra LC herb asteraceae
spotted orchids Dactylorhiza fuchsii LC herb orchidaceae
heath bedstraw Galium saxatile LC herb rubiaceae
dyer's greenweed Genista tinctoria LC herb fabaceae
meadow vetchling Lathyrus pratensis LC herb fabaceae
birdsfoot trefoil Lotus corniculatus LC herb fabaceae
common twayblade Neottia ovata NT herb orchidaceae
yellow-rattle Rhinanthus minor DD herb orobanchaceae
devils-bit scabious Succisa pratensis VU herb caprifoliaceae
glaucus sedge Carex flacca LC sedge cyperaceae
carnation sedge Carex panicea NT sedge cyperaceae
flea sedge Carex pulicaris NT sedge cyperaceae

Insects to look out for

These moths and butterflies 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.

SpeciesStatusVia host-plant
Black-veined moth
Siona lineata
Critically Endangered Centaurea nigra, Lotus corniculatus
New forest
Zygaena viciae
Critically Endangered Lathyrus pratensis, Lotus corniculatus
Straw belle
Aspitates gilvaria
Endangered Lotus corniculatus
Wood white
Leptidea sinapis
Endangered Lathyrus pratensis, Lotus corniculatus
Least minor
Photedes captiuncula
Endangered Carex flacca
Slender scotch
Zygaena loti
Endangered Lotus corniculatus
Mouse moth
Amphipyra tragopoginis
Vulnerable Lotus corniculatus
Dingy skipper
Erynnis tages
Vulnerable Lotus corniculatus
Marsh fritillary
Euphydryas aurinia
Vulnerable Succisa pratensis
Satyr pug
Eupithecia satyrata
Vulnerable Centaurea spp., Galium spp., Rhinanthus minor
Grayling
Hipparchia semele
Vulnerable Festuca ovina, Festuca rubra
Bedstraw hawk-moth
Hyles gallii
Vulnerable Galium spp.
Silver studded blue
Plebejus argus
Vulnerable Lotus corniculatus
Lead belle
Scotopteryx mucronata
Vulnerable Genista tinctoria
Latticed heath
Chiasmia clathrata
Near Threatened Lathyrus pratensis
Small heath
Coenonympha pamphilus
Near Threatened Agrostis spp., Cynosurus cristatus, Festuca spp.
The Silurian
Eriopygodes imbecilla
Near Threatened Galium saxatile
Autumnal rustic
Eugnorisma glareosa
Near Threatened Festuca ovina, Galium spp.
Grey pug
Eupithecia subfuscata
Near Threatened Centaurea spp.
Silver-spotted skipper
Hesperia comma
Near Threatened Festuca ovina
Scarce forester
Jordanita globulariae
Near Threatened Centaurea nigra
Wall
Lasiommata megera
Near Threatened Agrostis spp., Holcus lanatus
Rosy minor
Litoligia literosa
Near Threatened Carex flacca, Festuca ovina
Red carpet
Xanthorhoe decoloraria
Near Threatened Alchemilla spp.
Dark-barred twin-spot carpet
Xanthorhoe ferrugata
Near Threatened Galium spp.

Hostplant 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 (Open Government Licence). Contains data supplied by UK Centre for Ecology & Hydrology.