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 "Pseudotsuga"): Pseudotsuga menziesii" is widespread in western North America and is an important source of timber.
Relevant evidence: No