Trees include a huge Wellingtonia, a Sequoia and a Tsuga heterophylla. Field observations suggest that the fungus can form ectomycorrhizal associations with "Tsuga heterophylla". "Tsuga heterophylla" (western hemlock) is occasionally found. The larvae feed on "Pinus ponderosa", "Pinus sabiniana" and "Tsuga heterophylla". The mill used "Tsuga heterophylla" (western hemlock) trees to create a premium bleached paper pulp.