NS4074 : Rust fungus galls on Alexanders

taken 3 years ago, near to Dumbarton, West Dunbartonshire, Great Britain

Rust fungus galls on Alexanders
Rust fungus galls on Alexanders
The location is shown in NS4074 : Path beside Dumbarton Rock; see that picture for context.

The plant, which formed a patch there, is NS4074 : Alexanders (Smyrnium olusatrum); that item, as well as showing the plant as a whole, explains why the species, which is not otherwise common in the wider area, is found here beside Dumbarton Rock.

The yellow spots shown here are galls caused by the rust fungus Puccinia smyrnii (colloquially, Alexanders Rust). The picture shows the upper side of the leaf. On the underside of each of these yellow blisters were several tiny, vividly-yellow, cup-like aecia, very much like the ones shown in NS3679 : Gall on nettle, although a different rust fungus is involved there; that item also comments on the complex life-cycles of the rust fungi in general.
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NS4074, 222 images   (more nearby )
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Date Taken
Friday, 13 May, 2016   (more nearby)
Monday, 13 June, 2016
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Subject Location
OSGB36: geotagged! NS 4004 7458 [10m precision]
WGS84: 55:56.2547N 4:33.7486W
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OSGB36: geotagged! NS 4004 7458
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Southwest (about 225 degrees)
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Plant Gall 

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