Caeau Troed-Rhiw-Drain (Troed-Rhiw-Drain Meadows)

Site of Special Scientific Interest · 52.2917, -3.6159

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Powys County

Habitats

Lowland wet heath, Upland wet heath

Description

Description These fields are outstanding examples of upland herb-rich hay meadows in which a number of rare plant species are well represented. The meadows are variants of a characteristic mid Wales type of grassland in which the nationally rare wood bitter-vetch Vicia orobus and bluebell Hyacinthoides non-scripta are abundant. Other characteristic species which occur frequently are yellow rattle Rhinanthus minor, great burnet Sanguisorba officinalis and eyebright Euphrasia agg. The uncommon greater butterfly-orchid Platanthera chlorantha and fragrant orchid Gymnadenia conopsea occur in both the northern and southern parts of the site. The southern-most area is subdivided by wet areas and includes relatively uniform areas of a drier type of bent-fescue Agrostis-Festuca grassland with sweet vernal-grass Anthoxanthum odoratum and an abundance of herb species. Wet banks and streamsides dominated by purple moor-grass Molinia caerulea show affinities with wet heath vegetation and have an abundance of heath spotted-orchid Dactylorhiza maculata. Boggy areas here and in the northern area support both butterwort Pinguicula vulgaris and round-leaved sundew Drosera rotundifolia. The northern area comprises a more variable, but generally more productive sward of bent-fescue grassland, although the part adjacent to the reservoir is generally wetter with more purple moor-grass. Dry banks and rock outcrops also occur. Wetter areas are reflected by a good representation of meadow thistle Cirsium dissectum and the locally uncommon sawwort Serratula tinctoria. The uncommon globeflower Trollius europaeus occurs in one area and fragrant orchid is present in some numbers.

Species mentioned

English name
search for this in other sites		 Latin name
search with Google		 IUCN / Red List Type Family
sweet vernal grass Anthoxanthum odoratum LC grass poaceae
purple moor grass Molinia caerulea LC grass poaceae
meadow thistle Cirsium dissectum EN herb asteraceae
heath spotted orchid Dactylorhiza maculata LC herb orchidaceae
round leaved sundew Drosera rotundifolia LC herb droceraceae
fragrant orchid Gymnadenia conopsea NT herb orchidaceae
bluebell Hyacinthoides non-scripta LC herb liliaceae
butterwort Pinguicula vulgaris LC herb lentibulariaceae
greater butterfly orchid Platanthera chlorantha NT herb orchidaceae
yellow-rattle Rhinanthus minor DD herb orobanchaceae
great burnet Sanguisorba officinalis LC herb rosaceae
saw wort Serratula tinctoria VU herb asteraceae
globe flower Trollius europaeus VU herb ranunculaceae
wood bitter vetch Vicia orobus VU herb fabaceae

Plant communities

H3 — Lowland dry heath, Lowland wet heath

Ulex minor-Agrostis curtisii heath

Quercus robur, Calluna vulgaris, Erica ciliaris, Erica cinerea, Erica tetralix, Ulex europaeus, Ulex minor, Carex pilulifera, Schoenus nigricans, Campylopus brevipilus, Campylopus flexuosus, Leucobryum glaucum, Hypnum jutlandicum, Polytrichum juniperinum, Kurzia spp., Hypogymnia physodes, Cladonia arbuscula, Cladonia coccifera, Cladonia crispata, Cladonia floerkeana, Cladonia impexa, Cladonia pyxidata, Cladonia uncialis, Cuscuta epithymum, Hypericum pulchrum, Polygala serpyllifolia, Potentilla erecta, Viola lactea, Agrostis curtisii, Danthonia decumbens, Molinia caerulea, Pteridium aquilinum, Zygogonium ericetorum

H4 — Lowland dry heath, Lowland wet heath, Upland dry heath

Ulex gallii-Agrostis curtisii heath

Salix repens, Calluna vulgaris, Erica ciliaris, Erica cinerea, Erica tetralix, Erica vagans, Vaccinium myrtillus, Ulex gallii, Carex binervis, Carex flacca, Carex montana, Carex panicea, Carex pilulifera, Trichophorum cespitosum, Juncus squarrosus, Luzula multiflora, Pohlia nutans, Campylopus flexuosus, Campylopus introflexus, Dicranum scoparium, Leucobryum glaucum, Racomitrium lanuginosum, Hypnum cupressiforme, Pleurozium schreberi, Pseudoscleropodium purum, Rhytidiadelphus squarrosus, Polytrichum juniperinum, Calypogeia fissa, Calypogeia muelleriana, Cephalozia bicuspidata, Diplophyllum albicans, Lophocolea bidentata, Hypogymnia physodes, Cladonia arbuscula, Cladonia chlorophaea, Cladonia coccifera, Cladonia crispata, Cladonia fimbriata, Cladonia floerkeana, Cladonia furcata, Cladonia impexa, Cladonia subcervicornis, Cladonia uncialis, Cuscuta epithymum, Lotus corniculatus, Thymus praecox, Pedicularis sylvatica, Polygala serpyllifolia, Polygala vulgaris, Potentilla erecta, Galium saxatile, Viola lactea, Agrostis canina, Agrostis capillaris, Agrostis curtisii, Anthoxanthum odoratum, Danthonia decumbens, Deschampsia flexuosa, Festuca ovina, Festuca rubra, Molinia caerulea, Nardus stricta, Pteridium aquilinum

H5 — Lowland wet heath

Erica vagans-Schoenus nigricans heath

Salix repens, Calluna vulgaris, Erica cinerea, Erica tetralix, Erica vagans, Ulex europaeus, Ulex gallii, Carex flacca, Carex hostiana, Carex panicea, Carex pulicaris, Eriophorum angustifolium, Schoenus nigricans, Eleocharis multicaulis, Juncus acutiflorus, Juncus maritimus, Fissidens adianthoides, Kindbergia praelonga, Scorpidium scorpioides, Calypogeia fissa, Riccardia multifida, Angelica sylvestris, Eupatorium cannabinum, Serratula tinctoria, Succisa pratensis, Drosera rotundifolia, Genista anglica, Hypericum pulchrum, Scutellaria minor, Thymus praecox, Pinguicula lusitanica, Linum catharticum, Dactylorhiza incarnata, Dactylorhiza maculata, Gymnadenia conopsea, Platanthera bifolia, Pedicularis sylvatica, Plantago maritima, Polygala vulgaris, Anagallis tenella, Potentilla erecta, Sanguisorba officinalis, Galium uliginosum, Agrostis curtisii, Agrostis vinealis, Danthonia decumbens, Festuca ovina, Molinia caerulea, Phragmites australis, Chara curta

M14 — Lowland dry heath, Upland wet heath

Schoenus nigricans-Narthecium ossifragum mire

Pinus sylvestris, Calluna vulgaris, Erica tetralix, Myrica gale, Ulex gallii, Carex panicea, Eriophorum angustifolium, Rhynchospora alba, Schoenus nigricans, Eleocharis multicaulis, Juncus acutiflorus, Juncus bulbosus, Ctenidium molluscum, Hypnum jutlandicum, Scorpidium revolvens, Scorpidium scorpioides, Sphagnum auriculatum, Sphagnum palustre, Sphagnum papillosum, Sphagnum subnitens, Sphagnum tenellum, Calypogeia fissa, Kurzia pauciflora, Ordontoschisma sphagni, Aneura pinguis, Riccardia multifida, Drosera intermedia, Drosera rotundifolia, Pinguicula lusitanica, Narthecium ossifragum, Pedicularis sylvatica, Polygala serpyllifolia, Anagallis tenella, Potentilla erecta, Molinia caerulea

M15 — Blanket bog, Raised bog, Upland wet heath

Scirpus cespitosus-Erica tetralix wet heath

Empetrum nigrum subsp.nigrum, Calluna vulgaris, Erica cinerea, Erica tetralix, Myrica gale, Vaccinium myrtillus, Carex binervis, Carex demissa, Carex dioica, Carex echinata, Carex nigra, Carex panicea, Carex pilulifera, Carex pulicaris, Eriophorum angustifolium, Eriophorum vaginatum, Schoenus nigricans, Trichophorum cespitosum, Juncus acutiflorus, Juncus articulatus, Juncus bulbosus, Juncus conglomeratus, Juncus effusus, Juncus squarrosus, Luzula multiflora, Huperzia selago, Selaginella selaginoides, Aulacomnium palustre, Breutelia chrysocoma, Pohlia nutans, Campylopus atrovirens, Campylopus flexuosus, Dicranum scoparium, Leucobryum glaucum, Racomitrium lanuginosum, Hylocomium splendens, Hypnum cupressiforme, Hypnum jutlandicum, Plagiothecium undulatum, Pleurozium schreberi, Rhytidiadelphus loreus, Rhytidiadelphus squarrosus, Scorpidium revolvens, Scorpidium scorpioides, Polytrichum commune, Sphagnum auriculatum, Sphagnum capillifolium, Sphagnum compactum, Sphagnum fallax, Sphagnum palustre, Sphagnum papillosum, Sphagnum subnitens, Sphagnum tenellum, Calypogeia fissa, Calypogeia muelleriana, Diplophyllum albicans, Lophozia ventricosa, Ordontoschisma sphagni, Pleurozia purpurea, Aneura pinguis, Cladonia arbuscula, Cladonia chlorophaea, Cladonia coccifera, Cladonia impexa, Cladonia uncialis, Succisa pratensis, Drosera anglica, Drosera rotundifolia, Hypericum pulchrum, Triglochin palustre, Pinguicula vulgaris, Menyanthes trifoliata, Narthecium ossifragum, Dactylorhiza maculata, Euphrasia officinalis, Pedicularis palustris, Pedicularis sylvatica, Polygala serpyllifolia, Trientalis europaea, Potentilla erecta, Galium saxatile, Viola palustris, Agrostis canina, Agrostis capillaris, Agrostis stolonifera, Anthoxanthum odoratum, Danthonia decumbens, Deschampsia flexuosa, Festuca ovina, Festuca rubra, Festuca vivipara, Molinia caerulea, Nardus stricta, Blechnum spicant, Pteridium aquilinum