Lecanora thysanophora

Mapledust lichen

About plant names...

Mapledust lichen is common in eastern North America.

Identification: This lichen is pale yellow to greenish. It is thin and powdery looking, and may appear as a continuous coating, or be divided into patches. It is often scaly (leprose). A white fibrous band, the prothallus, borders the lichen. On close inspection, there may be one or two bluish zones of hyphae, the actively growing regions.

Close-up with mapledust lichen thallus (greenish, right), white prothallus border, and blue-gray line of hyphae.

Online References:

Stephen Sharnoff Photography

Www.jstor.org

The Mushroom Observer

References:

Walewski, Joe, Lichens of the North Woods, Kollath+Stensaas Publishing, 2007, p. 97

Lecanora thysanophora description by Thomas H. Kent, last updated 25 May 2020.

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On large sugar maple. · 9/26/2010 · Brooks Woodland Preserve, Swift River Tract, Petersham, Mass­a­chu­setts · ≈ 8 × 5″ (19 × 13 cm) ID is uncertain

On large sugar maple. · 9/26/2010 · Brooks Woodland Preserve, Swift River Tract, Petersham, Mass­a­chu­setts · ≈ 8 × 5″ (19 × 13 cm) ID is uncertain

9/28/2011 · Groton Place and Sabine Woods, Groton, Mass­a­chu­setts · ≈ 3 × 4½″ (7.9 × 11 cm) ID is uncertain

5/4/2023 · Tarbox Preserve, Topsham, Maine

5/4/2023 · Tarbox Preserve, Topsham, Maine

4/21/2023 · Robert P. Tristram Coffin Wildflower Preserve, Woolwich, Maine ID is uncertain

4/10/2010 · Nashua River Rail Trail, Groton, Mass­a­chu­setts · ≈ 4 × 6″ (10 × 15 cm) ID is uncertain

9/28/2011 · Groton Place and Sabine Woods, Groton, Mass­a­chu­setts · ≈ 4 × 6″ (10 × 15 cm) ID is uncertain

9/28/2011 · Groton Place and Sabine Woods, Groton, Mass­a­chu­setts · ≈ 3 × 4½″ (7.9 × 11 cm) ID is uncertain

9/28/2011 · Groton Place and Sabine Woods, Groton, Mass­a­chu­setts · ≈ 4 × 6″ (10 × 15 cm) ID is uncertain