Exobasidium vaccinii-uliginosi Boud.
no common name
Exobasidiaceae
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
no common name
Exobasidiaceae
Species account author: Ian Gibson.
Extracted from Matchmaker: Mushrooms of the Pacific Northwest.
Introduction to the Macrofungi
Photograph
Map
Distribution of Exobasidium vaccinii-uliginosi
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Species Information
Summary:
This is one of the species of Exobasidium that affects plants of the family Ericaceae, this species infecting plant shoots and causing leaves to be red on the upper side and felty dull light green on lower side. Savile''s description is from collections on Vaccinium uliginosum.
Microscopic:
spores 20-22 x 8-10 microns, elliptic-cylindric, smooth, inamyloid, colorless, some with droplets of granular contents; basidia 2-spored, 70-80 x 8-10 microns, cylindric to cylindric-clavate, without basal clamp connection; cystidia not seen; hyphae 1.5-3 microns wide, without clamp connections, (Breitenbach), spores 16-20 x 7-8 microns, curved toward the base, colorless; basidia 2-spored, fructification 30-45 microns thick, consisting of large basidia arranged side by side, (Burt), spores 15.5-22.5 x 7.3-9.0(11.5) microns, broadly clavate to elliptic "with hilum bluntly rounded and not prominent, never septate"; basidia projecting about 25-32 microns beyond cuticle, about 9.0-10.0 microns wide, with 2 (rarely 3) sterigmata up to 7.0 microns long x 1.8-2.5 microns wide at base; conidia absent, (Savile)
Notes:
It has been reported at least from WA (Burt), and BC (Ginns) and Savile examined collections from NL, NU, QC, and Sweden, but Nannfeldt''s work on Exobasidium species in Europe means that records need to be reassessed.
Habitat and Range
SIMILAR SPECIES
Exobasidium vaccinii has smaller, nearly cylindric spores, borne on (2)3-6(8)-spored basidia, (Savile). Exobasidium dimorphosporum is similar but spores of two forms: either 13.0-18.5 x 6.5-8.5 with inconspicuous hilum or 18.5-28.5(32.0) x 5.0-7.0(8.0) microns with hooked hilum, 0(1)-septate. The broad spores are somewhat too short and the narrow ones are too narrow and too long for E. vaccinii-uliginosi. (Savile). Exobasidium cordilleranum has smaller spores and has conidia (Savile). Exobasidium phyllodoces has smaller spores and basidia and collections were on Phyllodoce empetriformis. (Savile). Exobasidium empetri has smaller spores which are frequently 1-septate, and fruits on Empetrum nigrum. (Savile).Habitat
on Vaccinium uliginosum (bog bilberry), (Breitenbach), reported on Vaccinium uliginosum in YT, V. caespitosum (dwarf bilberry) in BC, (Ginns who notes that redisposition of records needs to occur as a result of Nannfeldt''s work on European Exobasidium species), on Vaccinium membranaceum, in WA, V. uliginosum and V. myrtillus in Europe, (Burt), collections examined from Ledum groenlandicum, Vaccinium myrtillus, Vaccinium uliginosum, (Savile)