Bruce - It's a pleasure to hear from you.  I myself am only a
preservationist of a 150-200 year old house, but I have close ties to the
preservationist community.  Considering my family's from up near your neck
of the woods (if you consider upstate NY in the neck of the Maine woods,
with all its leaves), I can easily appreciate how long it takes for a maple
leaf to fall.  However, you did not make it clear whether you mean a Sugar,
Silver, Red, Norway or some other type of maple, or is this generic for all
types of maples?

Ken has made it pretty clear that pure lurking will not be tolerated, so I
thought that I'd take this opportunity to do some participatin' before I'm
asked to leaf.
I'm not a credentialed Preservationist, just a simple restorer of, mostly,
old furniture, and, occasionally, old houses, abiding in beautiful South
Central Mid-Coast Maine, but around here leaftime is a specific unit of
chronological measurement relating our famous regional hesitancy of speech
to the Newtonian drop-time of a maple appendage on a still day in late
Oct., as in "That Flatlander asked him the way to the Meeting House, and it
was three leaftimes before he go his answer".
Hope that helps.
Bruce Marcus