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International Society of Arboriculture
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United States

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Event Details

Cancelled - Basic Tree Identification

Date: June 4, 2020
Location: Clackamas Community College, Environmental Learning Center, Oregon City, Oregon, UNITED STATES
Organizer: Pacific Northwest Chapter of ISA
Sponsor: Pacific Northwest Chapter of ISA
Description: Proper tree management starts with knowing the tree you’re managing. When trying to recommend an appropriate treatment, diagnosing an issue, or understanding how a tree will respond to a change in conditions, identifying the tree you’re dealing with is the first step.

This basic identification workshop serves as an introduction to common terms, concepts, and techniques in tree identification. The objective of the course is to get you familiar with how to identify a tree, covering leaves, fruit, bark, twigs, and form.

As there are well more species that can grow in our region than can be covered in a single basic workshop, focus will be on larger concepts that will lay the ground work for future identification. We will cover the use of dichotomous keys and get familiar with descriptive terminology to help narrow down unknown species.

The workshop will be inside for the first half and will go outside for the second half to get familiar with using the concepts and terminology in the real world. The workshop will be hands on, and questions and interaction is encouraged. Please bring proper attire for standing and taking notes in inclement weather.

Location: Clackamas Community College, Environmental Learning Center, 19600 Molalla Ave., Oregon City, OR 97045

8:30am: Arrival, coffee, and networking
9:00am – 11:30am: Review Basics of Tree ID (terminology, concepts, techniques) and focus on some specific trees
11:30am—12:00pm: Lunch
12:00pm – 3:00pm: Walk through the trees, hands-on ID focused on concepts and common species

What to Bring:

Notebook for sketches and notes
Favorite ID books
Clothing for all weather situations


J. Casey Clapp works as a Tree Inspector for the City of Portland, OR, and was previously a consultant with Tree Solutions, Inc. He specializes in tree identification, forest-wide and individual tree management, tree diagnostics, risk assessments, and tree cones. He holds a Master of Science degree in Environmental Conservation with a focus in Forest Resources and Arboriculture (University of Massachusetts, Amherst) and a Bachelor of Science degree in Forest Management with a focus on Urban Forestry (Oregon State University). He’s been involved in urban forestry and arboriculture since 2010. Casey has been studying tree biology and dendrology since 2007, and has presented at conferences across the nation and internationally. He’s an ISA Certified Arborist and Qualified Tree Risk Assessor.
Contact Name: Margo Thorp
Contact Phone: 8003354391
Contact Email:

Seats Available: 30
CEUs available: Yes

Start Date: 9:00 AM, June 4, 2020
End Date: 3:00 PM, June 4, 2020

Address: Clackamas Community College, Environmental Learning Center
19600 Molalla Ave.
Oregon City
108 Events