R433 Alpigenous acidophilous grassland
Description
Mostly continuous short grasslands on stony, poorly developed soils in the highest siliceous massifs, mainly at truly alpine levels (i.e. above S23y) or, if below, in cool, exposed ridges close to S223. They can be interpreted as an acidophilous analogue of the highest communities of R441. They correspond to EUNIS level V unit R4336 (“Cantabrian Oreochloa blanka swards).
Floristic Composition
Frequent species
Juncus trifidus
1,
Scorzoneroides pyrenaica
0.76,
Luzula spicata
0.68,
Festuca summilusitana
0.65,
Jasione crispa
0.57,
Silene ciliata
0.57,
Agrostis rupestris
0.54,
Avenella flexuosa
0.54,
Armeria cantabrica
0.51,
Oreochloa elegans
0.46,
Festuca eskia
0.46,
Saxifraga moschata
0.43,
Sedum brevifolium
0.38,
Sedum candolleanum
0.32,
Vaccinium uliginosum
0.27,
Minuartia recurva
0.24,
Helictotrichon sedenense
0.24,
Alchemilla saxatilis
0.24,
Alchemilla transiens
0.24,
Thymus praecox
0.19,
Alchemilla alpina
0.19,
Luzula caespitosa
0.16,
Poa cenisia
0.16,
Vaccinium myrtillus
0.16,
Sempervivum arachnoideum
0.16,
Sedum anglicum
0.14,
Antennaria dioica
0.14,
Cryptogramma crispa
0.14,
Jasione laevis
0.14,
Alchemilla hoppeana aggr.
0.11,
Saxifraga pentadactylis
0.11,
Poa alpina
0.11,
Carex parviflora
0.08,
Pilosella officinarum
0.08,
Teesdalia conferta
0.08,
Silene acaulis
0.08,
Carex atrata
0.05,
Sedum alpestre
0.05,
Sempervivum vicentei
0.05,
Calluna vulgaris
0.05,
Androsace cantabrica
0.05,
Carex pyrenaica
0.05,
Euphrasia hirtella
0.05,
Murbeckiella boryi
0.05,
Nardus stricta
0.05,
Neoschischkinia truncatula
0.05,
Gnaphalium supinum
0.05,
Phyteuma hemisphaericum
0.05,
Gentiana verna
0.05,
Euphrasia salisburgensis
0.05,
Euphrasia minima
0.05,
Juniperus communis
0.05,
Valeriana montana aggr.
0.05
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Indicator species
Juncus trifidus 1
,
Scorzoneroides pyrenaica 0.74
,
Luzula spicata 0.67
,
Jasione crispa 0.56
,
Festuca summilusitana 0.55
,
Silene ciliata 0.54
,
Agrostis rupestris 0.54
,
Oreochloa elegans 0.46
,
Avenella flexuosa 0.45
,
Armeria cantabrica 0.45
,
Saxifraga moschata 0.43
,
Festuca eskia 0.38
,
Sedum candolleanum 0.32
,
Vaccinium uliginosum 0.27
,
Sedum brevifolium 0.26
,
Alchemilla transiens 0.24
,
Alchemilla saxatilis 0.24
,
Minuartia recurva 0.23
,
Helictotrichon sedenense 0.21
,
Alchemilla alpina 0.19
,
Poa cenisia 0.16
,
Sempervivum arachnoideum 0.16
,
Vaccinium myrtillus 0.14
,
Cryptogramma crispa 0.13
,
Antennaria dioica 0.13
,
Saxifraga pentadactylis 0.11
,
Poa alpina 0.08
,
Thymus praecox 0.08
,
Luzula caespitosa 0.08
,
Sedum anglicum 0.08
,
Carex parviflora 0.08
,
Jasione laevis 0.07
,
Teesdalia conferta 0.07
,
Alchemilla hoppeana aggr. 0.07
,
Carex pyrenaica 0.05
,
Sedum alpestre 0.05
,
Carex atrata 0.05
,
Androsace cantabrica 0.05
,
Gnaphalium supinum 0.05
,
Murbeckiella boryi 0.05
,
Valeriana montana aggr. 0.05
,
Euphrasia hirtella 0.04
,
Euphrasia minima 0.04
,
Gentiana verna 0.04
,
Sempervivum vicentei 0.03
,
Phyteuma hemisphaericum 0.03
,
Juniperus communis 0.03
,
Cerastium cerastoides 0.03
,
Atocion rupestre 0.03
,
Polypodium vulgare 0.03
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Regional distribution
