Lindsey’s Skyward™ Bald Cypress Taxodium distichium ‘Skyward’ PP22812

James Barborinas James Barborinas
Urban Forestry Services | Bartlett Consulting
Learn more about James Barborinas.

Once again, I find myself impressed with a relatively new tree cultivar. We are fortunate that nature provides so many alternatives. The Lindsey’s Skyward bald cypress tree has many unique qualities, especially attractive to urban plantings.   

First of all, it is a relatively compact tree, maturing out at less than 30 feet tall and under 10 feet wide. It is a deciduous conifer, dropping its small flat needles in the fall after an extended period of rusty red fall color. Many experienced arborists have stories of being called by tree owners to cut down or investigate why their tree is dying only to get the good news that it is similar to their broadleaf relatives, still alive and well, but going into dormancy. Read More "Lindsey’s Skyward™ Bald Cypress Taxodium distichium ‘Skyward’ PP22812"

The Ultimate Standard

Zeb Haney Zeb Haney
Tree Resource
Learn more about Zeb Haney.

I normally use this space to highlight our industry standards. My last update centered on getting our Regional Plant Appraisal Committee formed and working. The COVID-19 outbreak has caused a delay in this, and is affecting us all personally and professionally. So, I thought it appropriate to revisit the way we approach our work and talk a little about ethics.  Read More "The Ultimate Standard"

A Tree Selection Survey of Tree City USA Designated Cities in the Pacific Northwest

Authors: Dr. Paul Ries, Oregon State University, Corvallis, OR & Joshua Petter, Tree Solutions Inc, Seattle, WA

Editor’s note: This article is a follow-up to one published by the same authors in the Winter 2020 edition of PNW Trees.

Urban sprawl and development can lead to a reduction in the canopy volume of urban trees, which reduces the benefits provided by those trees. When selecting tree species for urban areas, carefully considering the site criteria can lead to greater benefits and longer-lived trees. Selecting a diverse array of trees contributes to urban forest diversity which can help avoid catastrophic tree losses due to pests and climate change.  Read More "A Tree Selection Survey of Tree City USA Designated Cities in the Pacific Northwest"

Sooty-Bark Disease of Maple

Chris Rippey Chris Rippey
Rippey Arboriculture, LLC
Learn more about Chris Rippey.

In February and March of 2020, samples taken for DNA Sequencing from a declining Sycamore maple (Acer pseudoplatanus) and red maple (Acer rubrum) in Seattle, Washington came back positive for Cryptostroma corticale, also known as Sooty-Bark Disease. This is the first time this disease has been found in red maple. 

Sooty Bark Disease attacks and kills the cambium and bark of infected trees resulting in canopy decline and eventually death. This pathogen is from northeastern America where it does not cause disease. It was introduced to Europe where it has caused a disease in field maple (A. campestre), Norway maple (A. platanoides) and box elder (A. negundo).  Read More "Sooty-Bark Disease of Maple"

Do Lightning Strikes Contribute to Tree Failure?

Chris Rippey Chris Rippey
Rippey Arboriculture, LLC
Learn more about Chris Rippey.

On the night of September 7th, 2019, over 1250 lightning strikes were recorded over Western Washington in a span of three and a half hours. Up until this point, I had never responded to a lightning struck tree. This storm presented me with the opportunity to assess four sites with lightning struck trees and two different types of lightning damage. This article will focus on the two most interesting. 

The first tree I assessed was a blue atlas cedar (Cedrus atlanticaGlauca). This tree was 49 inches in diameter and was roughly 85 feet tall. This tree looked like what I thought a typical lightning-struck tree would look like. About a third of the upper canopy and trunk was blown apart, and there was a twisting line of missing bark down the length of the trunk showing the path the lightning took to the ground. Read More "Do Lightning Strikes Contribute to Tree Failure?"

Editor’s Note

Benjamin Thompson Benjamin Thompson
Urban Forestry Program Manager, Washington State Department of Natural Resources
More articles by Benjamin Thompson.

This marks my second edition serving as Editor for this newsletter. I have to say that I really enjoy it. I appreciate the camaraderie among the membership and I continue to learn from the expertise and perspectives brought forth by our guest authors (let’s be frank, before becoming editor I can’t say that I actually read every article). As fulfilling as this role is, the Chapter and I also need more help.

Executive Director Cristina Bowerman and I would like to form an editorial committee to recruit and correspond with guest authors, edit and fact-check submitted articles, coordinate with advertisers, and potentially assist with the final layout before publication. Read More "Editor’s Note"

What’s New with the TREE Fund?

Evan Sussman Evan Sussman
Board TREE Fund Liaison & Sonshine Tree Care, LLC
Learn more about Evan Sussman.

With much of our work being restricted heavily due to COVID 19, we have had an unusual amount of time to refocus and allocate our efforts. I have been studying tree care standards and research to help develop new marketing material for areas of practice that I haven’t focused on in the past. For me, as I delve into this marketing project I keep coming across research that was supported by the TREE Fund. This is a great reminder to me of how integral the TREE Fund is in furthering the professional practice of arboriculture. Much of the published work funded by TREE Fund is available in the ISA’s Journal of Arboriculture and Urban Forestry. Read More "What’s New with the TREE Fund?"

Key Differences Between Expert Witnesses and Fact Witnesses

James Komen, Board Certified Master Arborist WE-9909B & Registered Consulting Arborist #555

Consulting Arborists are hired to provide opinions and information about trees. Often, they are called to do so in the context of litigation as experts or even as lay witnesses, also known as fact witnesses. Consultants may be designated as experts for litigation, or they may provide more limited consulting services for the parties involved. How consultants are classified can have significant consequences for their testimony, involvement, and compensation.  Read More "Key Differences Between Expert Witnesses and Fact Witnesses"

Aerial Lift Best Practices

Phillip Kelley Phillip Kelley
Contract Climber & Owner of Samara Tree Preservation and Training
More articles by Phillip Kelley.

During the past few years I have observed a rise in aerial lift use for arboriculture. An influx of tracked and other mounted lifts have made tree canopies more accessible than ever before. These tools can make a potentially hazardous tree removal safer and more productive. All that being said, I have also noticed an increase in accidents and injuries involving aerial lift devices.   Read More "Aerial Lift Best Practices"

Quarantine = Refocus

Phil Bennett Phil Bennett
More articles by Phil Bennett.

Tough times are upon us.  The challenges of Covid-19 have brought an interruption to our work that is unprecedented.  In Snoqualmie, our winter pruning season came to an abrupt end, and as I write there is a street lined with Nyssa sylvatica where only half of the trees have been pruned.  Our spring planting season got compressed into a few days, with no help from citizen volunteers, who are normally a mainstay of this effort.      

I feel very fortunate to still have a job and am working remotely for now.  It has given me the opportunity to reprioritize and work on some different projects.  I’d like to offer a few suggestions or possibilities of what could be done during this time:  Read More "Quarantine = Refocus"