I am looking for references about pine trees
I read an online article that some pine trees are "edible", while some are not. The article indicated the below list of pine trees are not edible and should be avoided. I know I've seen pine trees around Tucson. I am seeking a reference which I could purchase to be able to properly identify (and
avoid) the following types of pine trees.
Norfolk Island Pine (Araucaria heterophylla), the Yew (Taxus) and Ponderosa Pines (Pinus ponderosa — aka Western Yellow Pine, Blackjack Pine, or Bull Pine).
Below is a recommended Cooperative Extension publication titled "Pine Trees of Arizona" which may help you identify the edible trees in our area. If this publication does not answer your question, we recommend that you contact a local arborist for further identification.