Taphrina caerulescens
The inducer of this gall is unknown or undescribed.
Family: Taphrinaceae | Genus: Taphrina
Hosts: Quercus acutissima / Quercus agrifolia / Quercus ajoensis / Quercus alba / Quercus aliena / Quercus arizonica / Quercus berberidifolia / Quercus bicolor / Quercus buckleyi / Quercus cedrosensis / Quercus cerris / Quercus chapmanii / Quercus chrysolepis / Quercus coccifera / Quercus coccinea / Quercus cornelius-mulleri / Quercus douglasii / Quercus dumosa / Quercus durata / Quercus ellipsoidalis / Quercus emoryi / Quercus engelmannii / Quercus falcata / Quercus fusiformis / Quercus gambelii / Quercus garryana / Quercus geminata / Quercus georgiana / Quercus glauca / Quercus grisea / Quercus havardii / Quercus hemisphaerica / Quercus hypoleucoides / Quercus ilex / Quercus ilicifolia / Quercus ilicis / Quercus imbricaria / Quercus incana / Quercus inopina / Quercus ithaburensis / Quercus john-tuckeri / Quercus kelloggii / Quercus laceyi / Quercus laevis / Quercus laurifolia / Quercus lobata / Quercus lyrata / Quercus macrocarpa / Quercus margaretiae / Quercus marilandica / Quercus michauxii / Quercus minima / Quercus montana / Quercus muehlenbergii / Quercus myrtifolia / Quercus nigra / Quercus oblongifolia / Quercus pacifica / Quercus palmeri / Quercus palustris / Quercus parvula / Quercus petraea / Quercus phellos / Quercus polymorpha / Quercus prinoides / Quercus pubescens / Quercus pumila / Quercus pungens / Quercus robur / Quercus rubra / Quercus rugosa / Quercus sadleriana / Quercus shumardii / Quercus sinuata / Quercus sinuata breviloba / Quercus stellata / Quercus suber / Quercus texana / Quercus tomentella / Quercus toumeyi / Quercus turbinella / Quercus vacciniifolia / Quercus velutina / Quercus virginiana / Quercus welshii / Quercus wislizeni / Quercus x undulata
Detachable: integral
Color: gray, white, green
Texture: hairless
Abundance: abundant
Shape:
Season: Spring, Summer
Related:
Alignment: integral
Walls:
Location: upper leaf, lower leaf, between leaf veins
Form: non-gall, leaf blister
Cells: not applicable
Possible Range:i
Common Name(s):
Synonymy: 
Image by Adam Kranz © Public Domain / CC0
Image by Adam Kranz © Public Domain / CC0
Our ID Notes may contain important tips necessary for distinguishing this gall from similar galls and/or important information about the taxonomic status of this gall inducer.
A monograph of the genus Taphrina
“
Causing small to large, convex-concave, slightly swollen spots or blisters on leaves (occasionally deforming the whole leaf, but not forming true witches' brooms) on many species of Quercus.
”- AJ Mix: (1949) A monograph of the genus Taphrina©
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