Introduction to Lichens Workshop – The Holden Arboretum, Lake County, Ohio – June 29, 2019

Foliose Lichens on Yew Branch, Secrest Arboretum, Ohio

Lichens cover 6-8% of the Earth’s land surface, but most people are unfamiliar with these life forms, which attach themselves to rocks, tree bark, or the soil. A lichen is a combination of a fungus and either an alga or a cyanobacterium, and more than 15,000 species of lichens have been identified worldwide, including 3,600 in North America and about 550 kinds of lichen in Ohio.  

If you would like to learn about lichens, join us on Saturday, June 29, 2019 for a one-day Introduction to Lichens Workshop, the first lichens program ever held at The Holden Arboretum.        

Crustose, Foliose, & Fruticose Lichens on Dogwood, Vinton County, Ohio

We’ll begin the workshop with a slide program that will cover basic information on lichens, their structure, how they live and reproduce, where to find them, essential equipment for lichen observation and identification, and tips on collecting and photographing lichens in the field. Joining us will be several lichen experts from the Ohio Moss & Lichen Association (OMLA). Following the slide program, we will have a display of lichens collected at Holden Arboretum and other places in northeast Ohio.   

OMLA Members Examine Lichens in the Hocking Hills, Ohio

During the afternoon, OMLA members and Holden staff will lead group visits to the Display Gardens, Crabapple Collection, Lantern Court, Corning Lake, Lotus Pond, and other open areas of the Arboretum to find and collect lichens to establish a preliminary list of lichen species for Holden Arboretum.     

OMLA Members Identifying Lichens Collected in the Hocking Hills

The photo above shows OMLA members using microscopes and reference books to identify mosses and lichens collected earlier near Crane Hollow State Nature Preserve in the Hocking Hills. We will have several OMLA lichen experts as well as student microscopes and lichen reference books available to help us identify lichens collected during our afternoon field hikes around the Arboretum.  

We will have copies of several reference books on lichens available during the workshop. One of the best of these is an 80-page publication, Common Lichens of Ohio Field Guide, written by Ohio lichen expert Ray Showman, with photographs by Bob Klips, produced by the Ohio Division of Wildlife. This excellent guide includes a great introduction to lichens as well as information and color photographs on 73 species of Ohio lichens. You will receive a FREE copy of this guide as a participant in this lichens workshop.

This Holden Arboretum workshop is a great opportunity to learn about lichens, meet several of Ohio’s lichen experts, and help to produce a preliminary list of the lichens that may be found at the Arboretum. To register for the workshop, follow the link below:




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