North Pacific Western Hemlock - Sitka Spruce Forest

Type:Alliance
Parent classification:North-Central Pacific Western Hemlock - Sitka Spruce Rainforest
Scientific Name:Tsuga heterophylla - Picea sitchensis / Rhytidiadelphus loreus Forest Alliance
Location:United States (Alaska, Washington, Oregon); Canada (British Columbia)
Description:This alliance covers forests of the Pacific Northwest dominated by Picea sitchensis and Tsuga heterophylla on well-drained, fresh to moist, nutrient-poor sites with thin soils, usually directly facing the ocean. The understory is variable but species are indicators of nutrient-poor soils, such as Rhytidiadelphus loreus.
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Child types

Name
Picea sitchensis - Pseudotsuga menziesii / Gaultheria shallon Forest
Picea sitchensis - Tsuga heterophylla / Eurhynchium oreganum Forest
Picea sitchensis / Calamagrostis nutkaensis Forest
Picea sitchensis / Gaultheria shallon Forest
Picea sitchensis / Maianthemum dilatatum Forest
Picea sitchensis / Trisetum canescens Forest
Picea sitchensis / Vaccinium ovatum Forest
Thuja plicata - Tsuga heterophylla / Vaccinium ovatum - Gaultheria shallon Forest
Tsuga heterophylla - Thuja plicata - Picea sitchensis / Rhytidiadelphus loreus Forest

Habitat Vegetation Classification provided by NatureServe Explorer