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Advanced Tree Identification

May 16 @ 8:30 am - 2:30 pm
Instructor: J. Casey Clapp CEUs: 5 for A, U, TW, M, L

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 condition, identifying the tree you’re dealing with is the first step.

This course is designed as a supplement and compliment to the Basic Tree Identification course. Where the basic course just touched the surface, this advanced identification workshop will do a quick review of the basics, and then focus in on key concepts and topics that will expand upon your base knowledge.  Topics covered more in-depth include basic botany and biology with the goal of providing a more thorough understanding of what differentiates trees into genre, and ultimately species.

The workshop will be inside for the first half and will go outside for the second half to get practice putting the material to use.  The course ultimately is designed to build the broader knowledge of the practitioner, so examples of and comparisons between genre and species will be the focus. 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.

Workshop Agenda:

8:00 am – 8:30 am: Arrival, coffee and networking.

8:30 am – 10:30 am: Review Basics of Tree ID (terminology, concepts, techniques).

  • Further examination of fruit and flowers
  • Comparisons between genre
  • Comparison between species

10:30 am – 11:30 pm: Lunch/snack time

11:30 pm – 2:30 pm: Walk through the trees, hands-on ID focused on concepts and common species


J. Casey Clapp is an Associate Consulting Arborist with Tree Solutions, Inc., and manages the Portland, Oregon office.  He specializes in tree identification, urban forest 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.

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.

If you cannot attend a class for which you are registered, please contact the PNW-ISA office as soon as possible.

ISA CEUs: 5 for A, U, TW, M, L

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


UW Arboretum
2300 Arboretum Drive E
Seattle, WA 98112