and related spruces Prof Stephen Sillett's webpage with photos taken during canopy research. Description of Sitka Spruce in forestry (PDF) by US Department of Agriculture. Picea Sitchinesis 'Octopus tree' Pacific temperate rainforests sitchensis Trees of the West Coast of the United States Trees of the Southwestern United States Trees of the Northwestern United States Trees of Alaska Trees of British Columbia Trees of mild maritime climate Trees of subpolar oceanic climate Least concern flora of the United States Trees of the United States Trees of Western Canada Trees of Eastern Canada Trees of Subarctic America Symbols of Alaska