Xanthoparmelia plittii

Xanthoparmelia plittii (Gyel.) Hale

Parmelia plittii Gyel.

Plitt’s Rock Shield

About plant names...

This lichen is a North American native. It is also found in South America and South Africa.

Identification: This lichen is 1½-4" (4-10 cm) in diameter, found on exposed or partially shaded rock. It is foliose (leaflike). Tiny, fragile reproductive structures called isidia emerge from the surface. Except for the isidia, this lichen is identical to Xanthoparmelia cumberlandia

References:

Brodo, Irwin M.; Sharnoff, Sylvia Duran; Sharnoff, Stephen, Lichens of North America, Yale University Press, 2001, p. 739

Online References:

Xanthoparmelia plittii on Stephen Sharnoff Photography (excellent photos)

Xanthoparmelia plittii on Wikimedia Commons

Xanthoparmelia plittii description by Thomas H. Kent, last updated 25 May 2020.

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4/10/2010 · Tom & Susan’s, Pepperell, MA
≈ 4½ × 3" (11 × 7.9 cm) ID is uncertain

4/10/2010 · Tom & Susan’s, Pepperell, MA
≈ 4½ × 3" (11 × 7.9 cm) ID is uncertain

4/10/2010 · Tom & Susan’s, Pepperell, MA
≈ 7 × 4½" (17 × 11 cm) ID is uncertain

Range:

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