Please note: You will receive an invoice which includes instructions for payment. Payments must be received at least two weeks prior to the class date to secure your registration. Cancellations must also be received at least two weeks prior to be eligible for a refund.

Winter Tree and Shrub Identification for Western WA Puget Lowland Habitats - in-person

  • Thursday, January 26, 2023
  • 9:00 AM - 4:30 PM
  • Padilla Bay National Estuarine Research Reserve, Mt Vernon
  • 0


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This one-day class will emphasize winter field character identification of the wetland species and associated upland buffer species found in the Puget lowland region of Washington (approximately 12 trees and 60 shrubs, including willows). Class instruction will be oriented towards the needs of shoreline planners, delineators, and those involved with Ordinary High Water Mark determinations, and restoration.

The format will be a lecture/laboratory setup and taxa examined will include common lowland, freshwater (and a few estuarine) species. Fresh material will be provided if in season, and winter characteristics (buds, leaf scars, pith, and bark) will be covered in the winter season. Each class will begin with a short lecture covering the terminology and salient morphological characteristics needed for a taxonomic identification of the species of choice, field characteristics, some ecological aspects of the species’ common habitat, commonly associated species, distribution, potential use for restoration purposes, and any special ecological requirements. Lecture materials will include drawings, slides, and plant material. (6.5 CM AICP Credits/CEP Points)

Lunch is provided. 

Suggested texts: Cooke. 1997. A Field Guide to the Common Wetland Plants of Western Washington and Northwestern Oregon. Seattle Audubon. Available through University Books Store, Audubon Books Store and

Not required but recommended. (Dr. Cooke will supply much of the information) Gilkey, Halen. Winter Twigs. revised Edition: A Wintertime Key to Deciduous Trees and Shrubs of Northwest Oregon and Western Washington.

COVID-19 Considerations: All participants will be expected to follow Washington Department of Ecology’s COVID-19 guidelines at the time of the training. Masks are recommended. 

Instructor: Dr. Sarah Cooke specializes in wetland creation, restoration and enhancement projects, both in design and implementation. She excels in permitting assistance on the local, state, and national level. She has conducted scientific research on wetland ecosystems for the Puget Sound Wetland and Stormwater Management Manual. Her expertise includes restoration designs, wetland inventories, wetland delineation, OHWM studies, baseline studies, impact assessments, monitoring programs, rare plant surveys, soil surveys, vegetation mapping, and watershed analysis in the region.

Washington State Department of Ecology 


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