Lichens and Moss of the PNW (in-person, outside)

Lichens and Moss of the PNW (in-person, outside)

Date(s) - April 20, 2023
12:30 pm - 2:00 pm


If you’ve explored anywhere in the Portland area, you’ve probably noted how green it is. The trees and the ferns provide much of the green, but so do the lichens and moss. Join instructor Ruth Williams as she takes you on a walking exploration of the most common tiny green wonders you will see on local trails. Learn what makes each of them unique and how to identify common species.

About the instructor: Ruth Williams is a consulting arborist and plant enthusiast with degrees in Horticulture and Landscape Architecture from UC Davis. She has been drawing and painting plants for 17 years. She teaches botanical illustration and plant identification classes at Hoyt.

Read our adult education policies HERE.

If you qualify for an Oregon income assistance program, please email for details about further discounted program rates. 

If you are interested in learning more about becoming a Hoyt Arboretum Friends member for discounted program rates, please click HERE.

Masks are optional for programs.  If you are feeling any COVID-19 symptoms, please stay safe and stay home.


Bookings are closed for this event.

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