[Plant-education] unusual oak

Scott Shumway via plant-ed%40net.bio.net (by sshumway from wheatonma.edu)
Mon Nov 23 21:07:06 EST 2009

Today I saw an oak tree (Pin Oak, I think) that appeared from a distance 
to be covered with round fruits.  This was in MA, so there weren't any 
leaves on the tree and the "fruits" (NOT acorns) showed up very well.  
Upon closer inspection, they appeared to be galls.  But then I noticed 
that they were woody and covered with buds.  These structures were the 
size of golf balls and numbered in the hundreds, if not thousands.

What are they?  Witches brooms?

Scott Shumway
Professor of Biology
Wheaton College
Norton, MA 02766
sshumway from wheatonma.edu

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