U232 Oro-Cantabrian siliceous screes
Description
Patchy communities of highly specialised plants of diffuse habit colonising colluvia of loose, moving siliceous stones.
Protection
Protected under the code 8110 ("Siliceous scree of the montane to snow levels [Androsacetalia alpinae and Galeopsetalia ladani]") by the EU Habitat Directive.Floristic Composition
Frequent species
Cryptogramma crispa
49%,
Avenella flexuosa
47%,
Sedum brevifolium
37%,
Murbeckiella boryi
32%,
Silene foetida
28%,
Rumex suffruticosus
25%,
Dryopteris oreades
25%,
Neoschischkinia truncatula
17%,
Sedum hirsutum
16%,
Spergula viscosa aggr.
15%,
Phalacrocarpum oppositifolium
15%,
Vaccinium myrtillus
15%,
Agrostis tileni
14%,
Linaria alpina
14%,
Festuca eskia
11%,
Saxifraga pentadactylis
11%,
Festuca summilusitana
11%,
Rumex acetosella
10%,
Digitalis purpurea
9%,
Solidago virgaurea
9%,
Jasione crispa
9%,
Juncus trifidus
9%,
Sesamoides minor
8%,
Scorzoneroides pyrenaica
8%,
Valeriana montana aggr.
8%,
Ranunculus parnassiifolius aggr.
8%,
Trisetum hispidum
7%,
Armeria cantabrica
7%,
Campanula herminii
7%,
Dianthus langeanus
7%,
Jasione laevis
7%,
Paronychia polygonifolia
7%,
Sempervivum vicentei
6%,
Eryngium duriaei
6%,
Asplenium septentrionale
6%,
Hypericum richeri
6%,
Linaria saxatilis
6%,
Saxifraga spathularis
6%
view more...
Indicator species
Cryptogramma crispa 0.49,
Avenella flexuosa 0.44,
Murbeckiella boryi 0.31,
Silene foetida 0.28,
Rumex suffruticosus 0.25,
Dryopteris oreades 0.25,
Sedum brevifolium 0.18,
Vaccinium myrtillus 0.15,
Spergula viscosa aggr. 0.15,
Agrostis tileni 0.14,
Phalacrocarpum oppositifolium 0.12,
Festuca eskia 0.11,
Saxifraga pentadactylis 0.11,
Solidago virgaurea 0.09,
Jasione crispa 0.09,
Festuca summilusitana 0.09,
Juncus trifidus 0.09,
Neoschischkinia truncatula 0.09,
Digitalis purpurea 0.09,
Sesamoides minor 0.08,
Scorzoneroides pyrenaica 0.08,
Valeriana montana aggr. 0.08,
Ranunculus parnassiifolius aggr. 0.07,
Rumex acetosella 0.07,
Paronychia polygonifolia 0.07,
Jasione laevis 0.06,
Campanula herminii 0.06,
Trisetum hispidum 0.06,
Hypericum richeri 0.06,
Eryngium duriaei 0.05,
Saxifraga spathularis 0.05,
Asplenium septentrionale 0.05,
Dianthus langeanus 0.05,
Pilosella galiciana 0.05,
Leucanthemopsis flaveola 0.05,
Sempervivum vicentei 0.05,
Teesdalia conferta 0.04,
Sedum arenarium 0.04,
Erica arborea 0.04,
Hieracium murorum aggr. 0.04,
Epilobium angustifolium 0.04,
Sideritis lurida 0.04,
Gentiana lutea 0.04,
Conopodium majus aggr. 0.04,
Calluna vulgaris 0.03,
Juniperus communis 0.03,
Armeria cantabrica 0.03,
Senecio nebrodensis 0.03,
Cytisus oromediterraneus 0.03,
Doronicum carpetanum 0.03
view more...
Phytosociology
- Cryptogrammo crispae-Ranunculetum cabrerensis
- Cryptogrammo crispae-Silenetum gayanae
- Linario filicaulis-Ranunculetum cabrerensis
- Linario filicaulis-Sperguletum viscosae
- Phalacrocarpo oppositifolii-Rumicetum suffruticosi
- Sesamoido pygmaeae-Silenetum gayanae
- Triseto hispidi-Rumicetum suffruticosi
Relations with other habitat types
Acidophilous analogue of U283, in which at higher levels it might also be sensible to admit subunits based on differences in the size and mobility of the rock fragments.
Regional distribution
Known occurrences and potential area of occupancy of the habitat type in the study region.
