Observation 67091: Phragmidium mucronatum (Pers.) Schltdl.

When: 2011-05-08

Collection location: Liars Ridge Trail, Athens Conservancy, Athens Co., Ohio, USA [Click for map]

Who: Dan Molter (shroomydan)

No specimen available

This rust was growing on a multiflora rose bush.

Species Lists



Proposed Names

28% (1)
Recognized by sight
60% (2)
Recognized by sight: This pathogen has a Facebook… so you can friend it i suppose.
Used references: http://www.biopix.com/...

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: damon brunette (damonbrunette)
2011-05-09 23:50:57 CDT (-0400)

Possibly gall and rust?…
Maybe puccinia


I could go back
By: Dan Molter (shroomydan)
2011-05-09 23:40:11 CDT (-0400)

If nobody knows what it is, I could go back and collect a sample. Gas costs four dollars per gallon though, so I would need reassurance that the specimen is scientifically significant before making a special trip.

super cool
By: Danny Newman (myxomop)
2011-05-09 15:46:32 CDT (-0400)

have you scoped it?

thought it was a worm
By: Dan Molter (shroomydan)
2011-05-09 10:56:28 CDT (-0400)

There were several colonies on the same rose bush. All started at a node where a new branch was sprouting from an old cane, and all caused the swelling and curling seen here. I initially thought the bush was being attacked by caterpillars until I took a closer look.

It’s cool to see a parasitic fungus on Rosa multiflora. Anything that checks the spread of this invasive plant is a welcome sight.

Wow, very cool!
By: Tim Sage (NMNR)
2011-05-09 01:02:50 CDT (-0400)

Thanks for observing!!!!

Created: 2011-05-08 22:02:23 CDT (-0400)
Last modified: 2011-05-11 00:51:55 CDT (-0400)
Viewed: 215 times, last viewed: 2017-06-09 11:31:58 CDT (-0400)
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