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Advanced Tree Identification

June 5 @ 9:00 am - 3:00 pm
Instructor: J. Casey Clapp, M.S CEUs: 5.5 ALMTU / 5.5 B-S Registration Fees: $100.00 - $200.00

This course is designed as a supplement and complement to the Basic Tree Identification course. Where the basic course covered concepts and terminology of tree identification, this advanced identification workshop will expand upon those concepts and techniques, and cover individual species common to our area. We will be going over identification characteristics of common trees in the region.

Proper tree management starts with knowing the tree you’re managing. When trying to recommend an appropriate treatment, diagnosing an issues, or understanding how a tree will respond to a change in condition, identifying the tree you’re dealing with is the first step.

The workshop will be inside for the first third or less, and will go outside to cover individual species. However, to make the course as useful as possible, attendees should choose a few species or genre that they want to examine. 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, networking
  • 9:00am – 10:30am: Review Basics of Tree ID (terminology, concepts, techniques).
    • Further examination of fruit and flowers; Comparisons between genera; Comparison between species.
  • 10:30am – 11:30am: Walk through the trees, hands-on ID focused on concepts and common species
  • 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.

Refund Policy

  • Cancellations made at least 10 days prior to the event will be refunded at 100%.
  • Cancellations made within 5-9 days of the event will be refunded at 75%.
  • Cancellations made within 1-4 days of the event will be refunded at 50%.
  • Refunds will not be made available for no-shows.

Late Registration

  • Participants are expected to enroll prior to the registration deadline.
  • Participants can register at the door of the event only if space is available. Individuals will need to pack their own lunch.
  • Late registration is possible on a space available basis. You can contact our office at (800) 335-4391. There may, or may not be, room available for those who show up without registering ahead of time for the workshop. We encourage you to register for the workshop in advance.

Allied Professionals are members of allied organizations. See our list of qualifying organizations.


Clackamas Community College
19600 Molalla Ave
Oregon City, OR 97045 United States
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