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on Vaccinium

Vaccinium vitis-idaea, Amstelveen, Thijssepark © Miriam Langeveld

Vaccinium vitis-idaea, Amstelveen, Thijssepark

underside of a single leaf, with many uredinia and the unavoidable Mycodiplosis larvae

the uredinopsores are expelled via a pore

a living and a dead urediniospore

gall

uredinia minute, up to 0.2 mm, pustulate, at first long covered by the epidermis, later by an peridium with a centrale pore; spores orange yellow when fresh, 18-31 x 13-21 µm, minutely echinulate. Telia at the underside of fallen leaves, small brown crusts; spores intra-epidermal.

uredinia, telia

Ericaceae, monophagous

Vaccinium cylindraceum, myrtillus, oxycoccos, padifolium, uliginosum, vitis-idaea.

synonyms

Thekopsora vacciniorum; Pucciniastrum vaccinii Jørstad, 1951.

notes

The mycelium hibernates in the leaves of Vaccinium, making new uredinia in spring; a population therefore can maintain itself without host alternation.

references

Blumer (1946a), Doppelbaur (1968a), Doppelbaur (1973a), Ellis & Ellis (1997a), Gäumann (1959a), Gjaerum (1982a), Gjaerum & Sunding (1986a), González-Fragoso (1925a), Henderson (2000a, 2004a), Jage, Klenke, Kruse ao (2016a), Jage, Kruse, Kummer ao (2013a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), McTaggart, Geering & Shivas (2014a), Maier, Begerow, Weiß & Oberwinkler (2003a), Melgarejo Nárdiz, García-Jiménez, Jordá Gutiérrez ao (2010a), Mułenko, Sałata & Wołczańska (1995a), Negrean (1997a), Redfern & Shirley (2011a), Ruszkiewicz-Michalska (2006a), Schmid-Heckel (1985a), Spooner & Butterfill (1999a), Termorshuizen & Swertz (2011a), Vanderweyen & Fraiture (2007a), Wilson & Henderson (1966a), Woods, Stringer, Evans & Chater (2015a).