leaf "shadows

Wendy A. McCausland wm1k+ at andrew.cmu.edu
Fri Oct 28 13:02:04 EST 1994


Can anyone tell me what chemical in fallen leaves is responsible for
leaving the brown shadow on surfaces,  like concrete, where a leaf has
been laying?

Thanks in advance,
Wendy McCausland
wm1k+ at andrew.cmu.edu



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