Umbilicaria (Rock tripes) |... lostcoastoutpost.com

Smooth Rock Tripe,... www.reddit.com

Umbilicariaceae (lichenized... www.bayceer.uni-bayreuth.de...

The lichen genus... onlinelibrary.wiley.com

Umbilicaria umbilicarioides... www.researchgate.net

Mushroom lichen hi-res... www.alamy.com

Umbilicaria orientalis – a... www.cambridge.org

Smooth Rock Tripe,... www.reddit.com

Umbilicaria phaea var.... bioone.org

The lichen genus... link.springer.com

The lichen genus... link.springer.com

Lichens marins www.lichensmaritimes.org

The lichen genus... link.springer.com

Smooth Rock Tripe,... www.reddit.com

navel lichen (Umbilicaria... www.invasive.org

Cryosections of the... www.researchgate.net

The lichen genus... link.springer.com

Ecologies | Free Full-Text... www.mdpi.com

Lichens marins www.lichensmaritimes.org

BOLD Systems: Taxonomy... v3.boldsystems.org