A compact alphabetical reference to Ohio’s common foliose, fruticose, and crustose lichens.

A

American Rim Lichen (Lecanora americana) | Appalachian Beard Lichen (Usnea strigosa)

B

Bristly Beard Lichen (Usnea hirta) | British Soldier Lichen (Cladonia cristatella) | Bottlebrush Shield Lichen (Parmelia squarrosa)

C

Common Greenshield (Flavoparmelia caperata) | Common Powderhorn (Cladonia coniocraea) | Common Script Lichen (Graphis scripta) | Cumberland Rock Shield (Xanthoparmelia cumberlandia)

D

Dust Lichen (Lepraria species)

E

Elegant Sunburst Lichen (Xanthoria elegans)

F

Fluffy Dust Lichen (Lepraria finkii) | Frosted Rock Tripe (Umbilicaria mammulata)

G

Golden Shield Lichen (Xanthoparmelia plittii) | Green Shield Lichen (Flavoparmelia baltimorensis) | Gray Reindeer Lichen (Cladonia rangiferina)

H

Hammered Shield Lichen (Parmelia sulcata) | Hooded Tube Lichen (Hypogymnia physodes)

I

Iceland Moss Lichen (Cetraria islandica — occasional)

L

Lung Lichen (Lobaria pulmonaria — rare, old‑growth indicator) | Lemon Lichen (Candelaria concolor)

M

Mealy Pixie Cup (Cladonia chlorophaea) | Maple Dust Lichen (Lepraria lobificans)

O

Orange Sunburst Lichen (Xanthoria parietina)

P

Powdered Sunshine Lichen (Vulpicida pinastri) | Punctelia Bollard Lichen (Punctelia bolliana) | Punctelia Rudecta (Rough Speckled Shield)

R

Rock Tripe (Umbilicaria species) | Rosette Lichen (Physcia millegrana)

S

Smooth Rock Tripe (Umbilicaria smooth species) | Smoky Eye Boulder Lichen (Porpidia albocaerulescens) | Speckled Shield Lichen (Punctelia rudecta) | Star Rosette Lichen (Physcia stellaris)

T

Tube Lichen (Hypogymnia tubulosa) | Toadskin Lichen (Lasallia papulosa)

U

Usnea (Beard Lichens — multiple species)

W

Wart Lichen (Pertusaria species) | Whitewash Lichen (Phlyctis argena) | Wreath Lichen (Phaeophyscia rubropulchra)

Y

Yellow Map Lichen (Rhizocarpon geographicum — rare in Ohio) | Yellow Scale Lichen (Candelariella species)