Taphrina carveri n. sp.

On Acer saccharinum causing "leaf blister of silver maple."

Discolored areas on leaves sometimes somewhat wrinkled, scattered or occasionally confined to one part of the blade, consisting of circular, elliptical or irregular spots up to 25 or more on a single leaf and up to 3 by 1 cm in diameter, or of more elongated areas situated between the main veins and reaching the leaf margins, on dry herbarium specimens "sepia" above, "isabella color" and "light brownish olive" below, to "blackish brown" on both surfaces, sometimes upper surface covered with delicate bloom; asci amphigenous [on both upper and lower surface], more commonly hypophyllous.

Range: Ontario, AL, MI

- Anna Jenkins: (1939) New species of Taphrina on red maple and on silver maple^©

Reference: https://www.biodiversitylibrary.org/page/39699631#page/259/mode/1up