green "autumn" leaves

Susan J. Meades sjmeades at
Wed Oct 29 10:27:10 EST 1997


One of my students noticed that although most of the sugar maples here
in northern Ontario have turned gold and red (and have since dropped
their leaves), some of the sugar maples in town are still green. Someone
told her that it was due to the trunks being damaged, but I think it
probably is the source of these maples.  Trees planted in the city are
often garden stock from southern Ontario, where leaves don't turn as
early (southern ecotypes).  We've already had several frosts and 10 cm
of snow last week, so these city maples now have dead green leaves
hanging from the twigs. Does anyone have an accurate explanation for
this phenomenon?


Sue Meades
Sault Ste. Marie, ON

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