Gymnosporangium sp. - Gymnosporangium
Hawthorn (Crataegus) are the alternate host for two gall-causing rust species in the genus Gymnosporangium. Aecia are produced on reddish swollen spots on leaves, fruits, petioles and shoot. The aecia have long fringes (peridia) so the aecia have a pale brown whiskery appearance. The aecial stages are very similar and species cannot be distinguished from field photos in this stage.
The telial stages are on Juniper, the primary host - see gallery pages for Gymnosporangium confusum and Gymnosporangium clavariiforme. However, the two species are able to produce aecia in areas where there are no infected junipers.
See above.
See above.
Fairly frequent and widespread in Britain.
Fairly frequent in Leicestershire and Rutland.
David Gould
The Spearwort Fields, Aylestone
21 July 2010
on Hawthorn - underside of leaf
David Gould
The Spearwort Fields, Aylestone
21 July 2010
on Hawthorn - underside of leaf
David Gould
The Spearwort Fields, Aylestone
21 July 2010
on Hawthorn - upperside of leaf
David Nicholls
Ratby
24 June 2012
G. clavariiforme or confusum
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UK Map
Species profile
- Common names
- Juniper Rust
- Species group:
- Fungi
- Kingdom:
- Fungi
- Order:
- Pucciniales
- Family:
- Pucciniaceae
- Records on NatureSpot:
- 45
- First record:
- 21/07/2010 (Gould, David)
- Last record:
- 22/06/2023 (Pochin, Christine)
Total records by month
% of records within its species group
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Latest records
David Nicholls
Westfields Tennis Club
27 June 2012
David Nicholls
Fosse Meadows
13 July 2015
on hawthorn
David Nicholls
Fosse Meadows
13 July 2015
on hawthorn
