Taphrina californica

Taphrina australis

Taphrina japonica

Taphrina johansonii

Taphrina purpurascens

Taphrina confusa

Taphrina occidentalis

Taphrina caerulescens

Taphrina robinsoniana

Taphrina castanopsidis

Taphrina farlowii

Taphrina populi-salicis

Taphrina coryli

Taphrina ulmi

Taphrina polystichi

Taphrina populina

Taphrina flectens

Taphrina americana

Taphrina communis

Taphrina pruni-subcordatae

Taphrina flavorubra

Taphrina thomasii

Taphrina wiesneri

Taphrina virginica

Taphrina bullata

Taphrina gracilis

Taphrina fusca

Taphrina filicina

Taphrina cystopteridis

Taphrina carnea

Taphrina amelanchieris

Taphrina tormentillae

Taphrina aesculi

Taphrina faulliana

Taphrina pruni

Taphrina mexicana

Taphrina lutescens

Causing small to large (several centimeters in extent when swollen) orange-brown[*] galls on leaflets, midribs, and petioles of Dryopteris arguta (Kaulf.) Wats. The galls are fleshy and gelatinous, becoming small, wrinkled, and hard when dry; much swollen when wet. 

* Mix amended this in a later article, describing the galls as green in May-June when they first appear

Causing leaf-curl (without evident thickening) of small areas or of the whole blade of leaves of Carpinus caroliniana 


Causing leaf curl with thickening, affecting part or all of the blade, on leaves of Alnus japonica and A. rubra


Causing golden-yellow enlargements of carpels 

Causing leaf-curl, with great enlargement and reddish-purple coloration of leaves of Rhus copallina L., R. coriaria L., R. glabra L., and R. typhina L.


Deforming fruits and all floral parts of Prunus alabamensis Mohr, P. virginiana L., P. virginiana L. var. demissa Torr., and P. virginiana L. var. melanocarpa Sarg.


Causing tongue-like enlargements of bracts of female catkins of Alnus rhombifolia Nutt., A. rubra Bong, A. sinuata Ryd., and A. tenuifolia Nutt. Also causing small puffed or curled areas on the leaves of A. rhombifolia


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.


Causing protruding tongue-like enlargements of bracts and ovaries of female catkins of Alnus incana [rugosa] and A. rugosa [serrulata]. The tongues appear on the catkins near pollination time and are then very small: 2-3 mm. long. Later in the season when the fruits of the alder are well grown the tongues may measure several millimeters in length. Occasionally also causing leaf curl (involving all or part of the leaf), with typical thickening of leaves, on the same hosts.

[Mix 1954 pg. 58 updates the host names to A. rugosa and A. serrulata based on a revision of Alnus that had been published in the intervening years.]


Causing convex-concave spots on leaves of [Chrysolepis] chrysophylla, C. sempervirens

Causing leaf curl, thickened, malformed twigs (not witches' brooms), and deformed fruits (pockets) on Prunus serotina


Causing golden-yellow convex-concave spots on leaves of Populus fremontii  [and] P. trichocarpa ...


Causing leaf curl involving small spots, large areas, or the whole blade ... Affected areas at first yellowish, becoming white at maturity of asci.



Causing small, yellowish to brown, unthickened or slightly puffed spots on leaves


Causing small to large (up to 1 cm. diam.) yellowish or yellow-brown thickened spots on leaves of Polystichum acrostichoides
Distribution: eastern North America.


Causing golden yellow, convex-concave spots, often small (5-10 mm. diam.), but sometimes confluent and large, involving half or nearly all of leaf blade, on [various species of] Populus [Species relevant to North America are listed as "Hosts" above under modern names.]  . . . Distribution: [Eurasia,] locally throughout eastern North America, occasionally western North America


Causing leaf-curl and witches' brooms of Prunus emarginata
Distribution: Pacific Coast region of North America.

Causing witches' brooms on Betula [occidentalis var.] fontinalis Sarg., B. lutea [alleghaniensis] Michx., and B. papyrifera Marsh.


Causing deformation of fruits ("bladder plums," "[plum pockets](https://www.gallformers.org/glossary)") and of twigs, sometimes with curling of leaves (not witches' brooms) of Prunus americana Marsh. P. [americana var.] lanata  (Sudw.)
Mack, and Bush, P. hortulana Bailey ...  P. maritima Marsh., P. rnunsoniana Wight and Hedr., P. nigra Ait., P. salicina Lindl., P. tarda [umbellata], P. umbellata 

Causing deformed fruits (plum pockets) and thickened, malformed shoots on Prunus subcordata. [Mix 1956 specifies witches’ brooms and Mix 1954 adds “small osilated, puffed or swollen areas on leaf blades”]  


Causing smallish, elongated, pointed "plum pockets," and thickened deformed shoots on Prunus [pumila] besseyi, P. [pumila] depressa, P. pumila, P. pumila var. susquehanae


Causing witches' brooms on Prunus ilicifolia

Causing leaf curl (with only slight thickening) and witches' brooms  

Causing small, pale yellowish thickened areas or leaf curl of the whole blade, on leaves of Ostrya virginiana


Causing large, light-green to yellow (later brown), irregular blisters on leaves of Pyrus. Blisters are larger and less numerous than mite-gall blisters. 
Distribution: Wash.


Causing small (up to 5 mm. diam.) thickened areas, resembling small lesions of peach leaf curl, on leaves of Dryopteris marginalis


Causing small (up to 5 mm. in diam.) fleshy (convoluted when dry), yellowish galls on leaves of Dryopteris spinulosa 


Causing thickened areas of the leaf-curl type or small fleshy galls on leaves of Dryopteris spinulosa ... <NA-CA>

Causing small (0.5 to 2.0 mm. in diameter) galls on leaves of Cystopteris fragilis (L.) Bernh.
Distribution: Indiana, Kansas, Wisconsin.


Causing thickened, yellowish to red, leaf-curl lesions on leaves 


Causing witches' brooms on Amelanchier alnifolia 
Distribution: California

Causing small, whitish to yellowish thickened areas on leaves and stems 

[P.. simplex added as host in Mix 1954]


Causing small to large, round to irregular, yellow-brown blighted areas on leaves of Aesculus californica. Affecting whole shoots and shoot-systems. Specimens seen have not been true witches' brooms.
Distribution: California. 


Causing small (up to 5 mm. diam.) round to oval, lemon-yellow (brown in age or on drying) slightly thickened spots on leaves of Polystichum munitum.


Causing deformed fruits ("bladder-plums," "plum pockets") and thickened malformed twigs often bearing curled leaves on Prunus cerasifera Ehrh. var. divaricata Bailey, P. domestica L., P. insititia L., P. spinosa L., P. ussuriensis Koval. and Kost.


Causing small (up to 3 mm. diam.) pale yellow' unthickened spots (the central portion becoming covered with a layer of asci), on leaves of Thelypteris thelypteris [present-day synonym for species T. thelypteris is not known]


A monograph of the genus Taphrina