Yockenthwaite Meadows

Site of Special Scientific Interest · 54.2034, -2.1375

Condition (Natural England)

Favourable (1)
UnitFeatureConditionArea (ha)Assessed
SD911786 Favourable 11.13 2024-01-05

Geology & landscape

Geological Period: Carboniferous · Rock Type: Carboniferous Limestone, Limestone

Landscape processes: Fluvial

Description

Area, 11.2 hectares 27.7 ac First Notified, 1986 Description Yockenthwaite Meadows comprises six enclosures of exceptional botanical interest situated on steep south facing slopes in Langstrothdale at an altitude of c. 300 metres. Two sections of each of these fields are cut for hay, the flat alluvial strip adjacent to the River Wharfe and the upper shallow slopes which lie on Carboniferous Limestone soils. The steep central slope is left uncut, but the whole site is subject to aftermath grazing and as a result contains elements of both pasture and hay meadow vegetation. The grassland of the alluvial strip is neutral in character, comprising sweet vernal grass Anthoxanthum odoratum, common bent Agrostis capillaris and red fescue Festuca rubra, together with such herbs as common knapweed Centaurea nigra, pignut Conopodium majus, yellow rattle Rhinanthus minor and wood crane's bill Geranium sylvaticum. The pale sedge Carex pallescens also occurs commonly in the sward. While, in places, the steep slope and flat upper bench also bear neutral grassland of similar species composition, the shallow limestone soils support in addition a calcareous community containing meadow oat grass Avenula pratensis and downy oat grass Helicotrichon pubescens with herbs such as common bird's foot trefoil Lotus corniculatus, autumn hawkbit Scorzoneroides autumnalis, bugle Ajuga reptans, devil's bit scabious Succisa pratensis, salad burnet Poterium sanguisorba, hoary plantain Plantago media, fairy flax Linum catharticum and common milkwort Polygala vulgaris. Of particular note is the occurrence of three species of orchid, frog orchid Dactylorhiza viridis, fragrant orchid Gymnadenia conopsea and greater butterfly orchid Platanthera chlorantha and two species of fern, adder's tongue Ophioglossum vulgatum and moonwort Botrychium lunaria, all of which are uncommon species characteristic of old grassland.

Species mentioned

English name
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Latin name
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IUCN / Red List Type Family
moonwort Botrychium lunaria VU fern ophioglossaceae
adders-tongue fern Ophioglossum vulgatum LC fern ophioglossaceae
common bent Agrostis capillaris LC grass poaceae
sweet vernal grass Anthoxanthum odoratum LC grass poaceae
meadow oat grass Avenula pratensis Not listed in GB list grass poaceae
red fescue Festuca rubra LC grass poaceae
downy oat grass Helicotrichon pubescens Not listed in GB list grass poaceae
bugle Ajuga reptans LC herb lamiaceae
black knapweed Centaurea nigra LC herb asteraceae
pignut Conopodium majus LC herb apiaceae
frog orchid Dactylorhiza viridis VU herb orchidaceae
wood cranesbill Geranium sylvaticum LC herb geraniaceae
fragrant orchid Gymnadenia conopsea NT herb orchidaceae
fairy flax Linum catharticum LC herb linaceae
birdsfoot trefoil Lotus corniculatus LC herb fabaceae
hoary plantain Plantago media LC herb plantaginaceae
greater butterfly orchid Platanthera chlorantha NT herb orchidaceae
common milkwort Polygala vulgaris VU herb polygalaceae
salad burnet Poterium sanguisorba VU herb rosaceae
yellow-rattle Rhinanthus minor DD herb orobanchaceae
greater hawkbit Scorzoneroides autumnalis LC herb asteraceae
devils-bit scabious Succisa pratensis VU herb caprifoliaceae
pale sedge Carex pallescens VU sedge cyperaceae

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.

SpeciesStatusVia host-plant
Black-veined moth
Siona lineata
Critically Endangered Centaurea nigra, Lotus corniculatus
New forest
Zygaena viciae
Critically Endangered Lotus corniculatus
Straw belle
Aspitates gilvaria
Endangered Linum catharticum, Lotus corniculatus
Wood white
Leptidea sinapis
Endangered Lotus corniculatus
Slender scotch
Zygaena loti
Endangered Lotus corniculatus
Mouse moth
Amphipyra tragopoginis
Vulnerable Lotus corniculatus, Poterium sanguisorba
Dingy skipper
Erynnis tages
Vulnerable Lotus corniculatus
Marsh fritillary
Euphydryas aurinia
Vulnerable Plantago spp., Succisa pratensis
Satyr pug
Eupithecia satyrata
Vulnerable Centaurea spp., Rhinanthus minor
Garden dart
Euxoa nigricans
Vulnerable Plantago spp.
Grayling
Hipparchia semele
Vulnerable Festuca rubra
Silver studded blue
Plebejus argus
Vulnerable Lotus corniculatus
Grizzled skipper
Pyrgus malvae
Vulnerable Poterium sanguisorba
Garden tiger
Arctia caja
Near Threatened Plantago spp.
Small heath
Coenonympha pamphilus
Near Threatened Agrostis spp., Festuca spp.
Autumnal rustic
Eugnorisma glareosa
Near Threatened Plantago spp.
Grey pug
Eupithecia subfuscata
Near Threatened Centaurea spp.
Scarce forester
Jordanita globulariae
Near Threatened Centaurea nigra
Wall
Lasiommata megera
Near Threatened Agrostis spp.

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.

Plant communities

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

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