what is this?

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leeann6 Kermit, TX(Zone 7b) Oct 25, 2004

This is on my cottonless cottonwood tree,,, does anyone know what this is???

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Post #1110548
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kennedyh Churchill, Victoria, Australia(Zone 10a) Oct 25, 2004

It looks rather like one of the rust fungi. I tried searching for poplar rust fungus and found these:
http://www.glfc.cfs.nrcan.gc.ca/treedisease/conifer_aspen_rust_e.html
http://www.ipm.uiuc.edu/diseases/series600/rpd605/

Post #1110614
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leeann6 Kermit, TX(Zone 7b) Oct 25, 2004

Thank you so much,, I never would have thought it was a fungus! Learn something new everyday! thank you again for your help.....

Post #1110638
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