Robuta

https://www.rhs.org.uk/plants/331919/tsuga-mertensiana-subsp-mertensiana-var-mertensiana/details Tsuga mertensiana subsp. mertensiana var. mertensiana | mountain hemlock /RHS tsuga mertensiana mountain hemlock subsp var rhs https://www.semanticscholar.org/topic/Tsuga-mertensiana/1723171 Tsuga mertensiana | Semantic Scholar tsuga mertensiana semantic scholar