Physcia millegrana

Physcia millegrana
Conservation status
Secure  (NatureServe) [1]
Scientific classification
Kingdom:	Fungi
Division:	Ascomycota
Class:	Lecanoromycetes
Order:	Caliciales
Family:	Physciaceae
Genus:	Physcia
Species:	P. millegrana
Binomial name
Physcia millegrana Degel. (1940)

Physcia millegrana, commonly known as the mealy rosette lichen, ^[2] is a species of corticolous (bark-dwelling), foliose lichen in the family Physciaceae. It is common in the eastern United States. ^[2] It was formally described as a new species in 1940 by the lichenologist Gunnar Degelius. ^[3] This gray lichen with a pale underside is characterized by its coarse soredia (granular vegetative propagules) that are densely distributed the margins of lobes , giving them a somewhat ruffled appearance. ^[4]

Secondary metabolites (lichen products) found in Physcia millegrana include atraric acid, methyl 3-hydroxy orsellinate, and divaricatic acid. ^[5]

References

1. NatureServe. "Physcia millegrana". NatureServe Explorer. Arlington, Virginia. Retrieved 29 October 2025.
2. Brodo, Irwin M.; Sharnoff, Sylvia Duran; Sharnoff, Stephen (2001). Lichens of North America. Yale University Press. p. 555. ISBN   978-0-300-08249-4.
3. Degelius, G. (1940). "Contributions to the lichen flora of North America. I. Lichens from Maine". Arkiv för Botanik. 30A (1): 1–62 [56].
4. Tripp, Erin A.; Lendemer, James C. (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville: The University of Tennessee Press. p. 361. ISBN   978-1-62190-514-1.
5. Nugraha, Ari Satia; Laksono, Tinton Agung; Firli, Lilla Nur; Putri, Chintya Permata Zahky Sukrisno; Pratoko, Dwi Koko; Zulfikar, Zulfikar; Untari, Ludmilla Fitri; Wongso, Hendris; Lambert, Jacob M.; Dillon, Carolyn T.; Keller, Paul A. (2020). "Anti-cancer evaluation of depsides isolated from Indonesian folious lichens: Physcia millegrana, Parmelia dilatata and Parmelia aurulenta". Biomolecules. 10 (10) e1420. doi: 10.3390/biom10101420 . PMC   7600581 . PMID   33049949.