New House Meadow

Site of Special Scientific Interest · 52.2959, -3.5147

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Powys County

Geology & landscape

Geological Period: Cambrian

Landscape processes: Fluvial

Description

Description This site comprises a single field and adjacent roadside bank lying on gently sloping ground above the flood plain of the River Wye at Rhayader. It is an excellent example of a type of herb-rich grassland that is characteristic of the upland fringe of mid-Wales. Such sites are becoming increasingly rare as a result of agricultural intensification. Much of the drier grassland is dominated by mixtures of common bent Agrostis capillaris, sweet vernal-grass Anthoxanthum odoratum, crested dog's-tail Cynosurus cristatus, red fescue Festuca rubra and Yorkshire-fog Holcus lanatus. Common knapweed Centaurea nigra, pignut Conopodium majus, common bird's-foot-trefoil Lotus corniculatus, ribwort plantain Plantago lanceolata, tormentil Potentilla erecta and betony Betonica officinalis are frequent throughout this community. Other characteristic associates include heath-grass Danthonia decumbens, bitter-vetch Lathyrus montanus, devil's-bit scabious Succisa pratensis and burnet-saxifrage Pimpinella saxifraga. 'Woodland' species such as wood anemone Anemone nemorosa and bluebell Hyacinthoides non-scripta are locally prominent, as are locally uncommon plants such as adder's-tongue Ophioglossum vulgatum, greater butterfly-orchid Platanthera chlorantha and the nationally scarce wood bitter-vetch Vicia orobus. Particularly good colonies of the latter species occur on the roadside bank beyond the western boundary of the field. Remarks: The site lies within the Cambrian Mountains Environmentally Sensitive Area. The western boundary of the site includes the roadside verge.

Species mentioned

English name
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Latin name
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IUCN / Red List Type Family
adders-tongue fern Ophioglossum vulgatum LC fern ophioglossaceae
common bent Agrostis capillaris LC grass poaceae
sweet vernal grass Anthoxanthum odoratum LC grass poaceae
crested dog's tail Cynosurus cristatus LC grass poaceae
heath grass Danthonia decumbens NT grass poaceae
red fescue Festuca rubra LC grass poaceae
Yorkshire fog Holcus lanatus LC grass poaceae
wood anemone Anemone nemorosa LC herb ranunculaceae
betony Betonica officinalis VU herb lamiaceae
black knapweed Centaurea nigra LC herb asteraceae
pignut Conopodium majus LC herb apiaceae
bluebell Hyacinthoides non-scripta LC herb liliaceae
bitter vetchling Lathyrus montanus Not listed in GB list herb fabaceae
birdsfoot trefoil Lotus corniculatus LC herb fabaceae
burnet saxifrage Pimpinella saxifraga NT herb apiaceae
ribwort plantain Plantago lanceolata LC herb plantaginaceae
greater butterfly orchid Platanthera chlorantha NT herb orchidaceae
tormentil Potentilla erecta LC herb rosaceae
devils-bit scabious Succisa pratensis VU herb caprifoliaceae
wood bitter vetch Vicia orobus VU herb fabaceae

Plant communities

A9 — Fast flowing river and stream, Marginal and inundation, Pond ditch and canal, Sluggish river and stream

Potamogeton natans community

Schoenoplectus lacustris, Juncus bulbosus, Sparganium angustifolium, Sparganium erectum, Sparganium minimum, Alisma plantago-aquatica, Lobelia dortmanna, Equisetum fluviatile, Myriophyllum alterniflorum, Elodea canadensis, Lemna minor, Lemna trisulca, Nymphaea alba, Callitriche platycarpa, Callitriche stagnalis, Littorella uniflora, Potamogeton natans, Ranunculus trichophyllus, Glyceria fluitans, Chara subspinosa

A14 — Fast flowing river and stream

Myriophyllum alterniflorum community

Isolepis fluitans, Juncus bulbosus, Fontinalis antipyretica, Lobelia dortmanna, Equisetum fluviatile, Myriophyllum alterniflorum, Lemna minor, Callitriche stagnalis, Littorella uniflora, Potamogeton filiformis, Potamogeton gramineus, Potamogeton natans, Ranunculus peltatus, Chara spp., Nitella hyalina

A17 — Chalk river and stream, Fast flowing river and stream

Ranunculus penicillatus ssp. pseudofluitans community

Berula erecta, Nasturtium officinale, Elodea canadensis, Lemna minor, Callitriche stagnalis, Veronica beccabunga, Polygonum amphibium, Polygonum hydropiper, Potamogeton crispus, Potamogeton pectinatus, Ranunculus penicillatus ssp. pseudofluitans

A18 — Fast flowing river and stream

Ranunculus fluitans community

Fontinalis antipyretica, Fontinalis squamosa var. curnowii, Myriophyllum alterniflorum, Myriophyllum spicatum, Elodea canadensis, Mentha aquatica, Lemna gibba, Lemna minor, Potamogeton perfoliatus, Ranunculus fluitans, Glyceria fluitans, Phalaris arundinacea