Habitat and Range
Exobasidium vaccinii-uliginosi has larger, broadly clavate to elliptic spores borne on 2-spored basidia (Savile). Exobasidium cordilleranum has larger clavate spores and 2-3(4)-spored basidia. (Savile).according to Breitenbach et al. on Exobasidium vitis-idaea (they describe a variety of other Exobasidium species on other ericaceous plants); according to Burt, common and widespread on many ericaceous plants including Vaccinium vitis-idaea in Europe, and in the Pacific Northwest V. deliciosum, V. membranaceum, Arctyostaphylos uva-ursi, A. nevadensis, and Menziesia ferruginea, (Burt), reported on V. angustifolium (lowbush blueberry) among others in eastern North America, and in BC on the following species: V. macrocarpon (large cranberry), V. ovalifolium (mathers), V. parvifolium (red bilberry), V. scoparium (grouseberry), V. vitis-idaea (bog cranberry), Andromeda polifolia (bog rosemary), Arbutus menziesii (arbutus), Arctyostaphylos uva-ursi (bearberry), Cassiope mertensiana (white heather), Ledum groenlandicum (Labrador tea), Menziesia ferruginea (false azalea), Rhododendron macrophyllum (west coast rhododendron), 3 species of rhododendron imported from Japan, (Ginns who comments that redisposition needs to be made following Nannfeldt''s studies in Europe), according to Savile on Andromeda glaucophylla, A. polifolia, Arctostaphylos alpina, A. uva-ursi, Cassiope tetragona, Chamaedaphne calyculata, Kalmia polifolia, Rhododendron viscosum (type of E. discoideum), R. macrophyllum, Vaccinium angustifolium, V. corymbosum, V. macrocarpon, V. myrtilloides, V. myrtillus, V. ovalifolium, V. ovatum, V. oxycoccos, V. parvifolium (E. parvifolii), V. pennsylvanicum, V. scoparium, V. uliginosum, and V. vitis-idaea, (Savile), appears in summer and fall