Amateur Naturalist: Ponderosa Pine Tree Bark

Why do pine trees grow in straight lines? - Quora

Ponderosa pine tree bark. Love the layers.

File:Ponderosa Pine bark 2016-07-12 906.jpg - Wikimedia Commons

Ponderosa Pine Bark: Rocky Mountain Aromatherapy

Trees of Lake Tahoe – The Pines

Amateur Naturalist: A Windblown Tree

SelecTree: A Tree Selection Guide

Trees

Do all pine trees have the same fall colors? - Quora

The Mysteries of the Ponderosa Pine

Plants - Pine Mountain Club

Amateur Naturalist: How Trees And Beetles Communicate

Ponderosa Pine Bark