The recent warm, humid weather has provided excellent conditions for the development of stinging nettle rust fungus Puccinia urticata and there are some colourful infestations on our local nettle patches.
The disease tends to produced flattened, distorted stems and also .....
... patches of spore cups on the underside of the leaves.
For a close-up view of the spore cups and their contents in a related species of rust fungus, click here.
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