weird ivy infection???

[Jason A Broder]

My ivy has a bunch of transclucent-white nodules clustering at the nodes.  
Is this an infection of some sort? It is happening at more than one place on
the plant but always at nodes.
What is wrong with my plant???

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        **     \`)/      BOOOOOOOOM                               **          
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        **      \/                            jbroder at uoguelph.ca **               
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