Xanthoparmelia plittii (Gyel.) Hale

Parmelia plittii Gyel.

Plitt’s rock shield

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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 6 Dec 2020.

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

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

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

Range:

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