Umbilicaria pensylvanica #

Taxon #

Umbilicaria pensylvanica

Organization #

Rock Tripes

Identification #

Umbilicaria pensylvanica is a recognizable rock tripe that can identified in the field. The upper surface of this species is a tan to brown color and is covered in pustules. These pustules have corresponding depressions on the darkened to blackened undersides. This species lacks rhizines, isidia and soredia but can produce flat, black apothecia (Brodo et al. 2001, CLH).

Substrate #

Saxicolous

Chemical Tests #

upper cortex and medulla: K-, C+ red, KC+ red, Pd- (CLH)

Notes #

Possibly ubiquitous on the mainland but with collections and records lacking from SW Alaska; the Alaska Peninsula (CLH, Spribille et al. 2023)

Photos #