Tell the Difference Between Spruce and Pine Trees - Casey Trees

2 Conifers Great Pond Mountain Conservation Trust

Fanatical Botanical: Can evergreens grow candles?

Ultimate Guide to Identifying Your Evergreen: Fir, Spruce, Pine

How to tell the difference between a pine, spruce, and fir tree

Pinus lambertiana (sugar pine) description - The Gymnosperm Database

Utah State study shows pros, cons of roller felling forests

Tell the Difference Between Spruce and Pine Trees - Casey Trees

The Best Pine, Fir, and Spruce Identification Guide

Plant Spotlight On: Spruce Tree

The Best Pine, Fir, and Spruce Identification Guide