Posted by: atowhee | September 26, 2019


As I was researching prior to my first-ever class on trees, I had to limber up my brain.  There is a forest of facts we now know about trees beyond the elementary biology back when I was in school.  Then it was layers of bark, photosynthesis and roots. We now know that every living tree trunk is NOT a single tree but often just one sprout off a long-lived, wide-spreading root system that may have many trunks, even a grove of trunks.  If the root system is healthy a cut, wind-felled or burned trunk may simply lead to more new growth above the ground.moon

So here are some of the sources I saw and from which I harvested information.  There is much online where you can root around.  You can leaf through an orchard of books, many new and some venerable.  Trees can now be seen as a rich branch of knowledge: from legend and folklore, to forest bathing and self-therapy, to science, and down into profit-mongering orchardry.  This world of trees is our world, and we are in theirs.  It seems highly unlikely our species would survive on a planet devoid of trees.
Herewith some of my sources:

Tree reference sites:

Christmas Tree Business in Northwest:

Climate—uneven heating in US:


David Douglas in the Northwest:

Diseases in Oregon trees:

Forest regeneration after fire:

Forest succession and change:

Forest succession and types:

Garbage forest on Staten Island:

Monumental Trees in Oregon:

Mycorrhizal fungi animation:

Mycorrhizal fungi, longer animation:

Oak galls:

Oregon’s state  Department of Forestry (ODF):

ODF data sets and maps:

Oldest trees on earth:

Oregon Champion Tree Registry:
does not give locations!

Oregon Forest Resources Institute (ORFI, education arm of the timber business):

ORFI data on trees as product and part of habitat:

Pando the Grand, huge aspen organism:



People poisoned pines in eastern Oregon:
tree killer is aminocyclopyrachlor, or ACP, used to keep weeds down!

Sap movement:

Sequoia in snowstorm, The President:

Sequoias, list of largest:

Sudden oak death economic impact:

Sugars, C6H12O6:

U.S. Forest Service Northwest Region:

Western hemlock:

Tree Bibliography:

Northwest Trees. Stephen Arno & Ramona Hammerly.  Mountaineers Books.  Seattle.  2007. An identification guide.

This Living Earth.  David Cavagnaro.  American West.  Palo Alto.  1972.  Images of beauty, words of wisdom.

Lewis and Clark.  Pioneering Naturalists.  Paul Cutright.  University of Illinois.  Urbana.  1969.

“How Flowers Changed the World” in The Immense Journey.  Loren Eiseley.  Random House.  New York.  1957.

Trees.  Andreas Feininger.  Penguin Books.  London.  1968.  Feininger is a photographer and this is his personal testimony to what trees signify to him, a planetary view and not localized.

The Wood for the Trees. One Man’s Long View of Nature. Richard Fortey.  Knopf. New York. 2016.  Set in an English woodland but has global relevance.

The Tree.  John Fowles.  Nature Company.  1994.  Photos by Wm. Neill.  Essay by the well-known English novelist. “Slinking into trees [as a child] has always been slinking into heaven.”

The Yew Tree.  A Thousand Whispers.  Hal Hartzell, Jr.  Hulogosi.  Eugene.  1991.

Green Immigrants.  The Plants That Transformed America.  Claire Haughton.  Harcourt Brace.  New York.  1978.

Trees to Know in Oregon.  Edward Jensen, et al.  Oregon State University Extension Service.  Corvallis.  2005.  A good field guide.

Conifers of the Pacific Slope. Michael Kauffmann. Backcountry Press.  Kneeland, CA. 2013.

The Alternative Heart. Conversations with Trees.  Stephanie Kaza.  Ballantine Books. New York. 1993.

Oregon’s Ancient Forests: A Hiking Guide. Chandra LeGue.  Oregon Wild.  Portland.  2019.

Oak.  The Frame of Civilization.  William Logan.  Norton. New York.  2005.  Describes how so much of our world before steel was made of oak, from bridges to sailing ships.

Trees and Shrubs of Yamhill County.  Amie Loop-Frison. Yamhill Soil & Water Conservation District.  McMinnville.  n/d.

Welcome to Subirdia.  John Marzluff.  Yale University.  New Haven.  2014.  A look at how suburgan gardens and parks invite some species to live next to people.

Forest Primeval.  The Natural History of an Ancient Forest.  Chris Maser.  Sierra Club.  San Francisco.  1989.  Traces the history of a Douglas fir forest in the Oregon Cascades.

Common to This Country.  Botanical Discoveries of Lewis & Clark.  Susan Munger.  Artisan.  New York. 2003.

David Douglas. A Naturalist at Work.  Jack Nisbet.  Sasquatch Books.  Seattle. 2012.

An Environmental History of the Willamette Valley. Elizabeth and William Orr. History Press. Charleston, SC.  2019.  Full of interesting facts and 19th Century accounts of the valley.  Stunning that it not once mentions any people in the valley before the white explorers.  Then I note it was published in South Carolina.

A Natural History of Western Trees.  Donald Curloss Peattie.  Houghton Mifflin.  Boston.  1953.  Runs through all the native species of trees.  A classic illustrated with fine woodcuts.

Mycorrhizal Planet.  Michael Phillips.  Chelsea Green.  White River Junction, VT.   2017.






Trees of Western North America. Richard Spellenberg, et al.  Princeton University.  Princeton.  2014.

The Food Explorer. Daniel Stone.  Dutton.  New York.  2018.

The Tree.  A Natural History of What Trees Are, How They Live, and Why They Matter.  Colin Tudge.  Crown Publishers.  New York. 2006.

Trees.  The Yearbook of Agriculture.  United States Dept. of Agriculture. Government Printing Office.  Washington D.C. 1949.

The Hidden Life of Trees.  What They Feel, How They Communicate.  Peter Wohlleben. Greystone Books.  Vancouver, BC. 2015. 

Domestication of Plants in the Old World. Third Edition. Daniel Zachary and Maria Hopf.  Oxford University.  Oxford. 2000.

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