Question: Pseudotsuga, found in North America and Eastern Asia which has also been classified as 'Abies' and 'Tsuga' and Huernia which is found in Eastern and Southern Africa and closely related to 'Stapelia' and 'Hoodia' are both types of what?
Sentence (from "Hemlock woolly adelgid"): The pest has now been established in eighteen eastern states from Georgia to Massachusetts, causing widespread mortality of hemlock trees.
Relevant evidence: No