Plant Association Information
Salix planifolia, Betula nana, Calamagrostis lapponica, Petasites hyperboreus, feathermoss
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The major species of the shrub layer are Salix planifolia ssp. pulchra (30% cover, 1 meter height), Betula nana (0.8 meters height, 10% cover) and Spiraea beauverdiana (0.7 meters height, 10% cover). The major species of the herbaceous layer are Calamagrostis lapponica (50% cover), Polemonium acutiflorum (5% cover), Rubus arcticus (10% cover), Aconitum delphinifolium (5% cover), Epilobium angustifolium (5% cover) and Petasites hyperboreus (20% cover). Important species that occasionally occur in this type are Vaccinium vitis-idaea (15% cover), Empetrum nigrum (15% cover), Luzula tundricola (5% cover), Heracleum lanatum (5% cover) and Sanguisorba officinalis (3% cover). The major species of the nonvascular layer are Hylocomium splendens (30% cover), Politrichium species (10% cover), Rhytidium rugosum (5% cover), Cetraria species (10% cover), Cladonia species (10% cover), Peltigera species (5% cover), Nephroma species (5% cover) and Pleurozium schreberi (5% cover).
This type is found at an average altitude of 844 meters with a slope of 8% and an average aspect of 198 degrees. The range in elevation is 732 meters, the range in slope is 1% to 33%, and the range in aspect is 166 to 296 degrees. The bedrock geology in 89% of the plots is sedimentary/metasedimentary and in 11% of the plots is volcanic. The surficial geology in 56% of the plots is bedrock, in 33% of the plots is glacial moraines and in 11% of the plots is alluvial deposits.
Associated Plant Species: Aconitum delphinifolium,
Betula nana,
Calamagrostis lapponica,
Chamerion angustifolium,
Empetrum nigrum,
Heracleum lanatum,
Hylocomium splendens,
Luzula kjellmaniana,
Petasites frigidus,
Pleurozium schreberi,
Polemonium acutiflorum,
Rhytidium rugosum,
Rubus arcticus,
Salix pulchra,
Sanguisorba officinalis,
Spiraea stevenii,
Vaccinium vitis-idaea