Xanthoparmelia plittii (Gyel.) Hale

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:

Stephen Sharnoff Photography (excellent photos)

Wikimedia Commons

The Consortium of North American Lichen Herbaria

The Mushroom Observer

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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