For a good discussion of domesticates and "escape" species, see:

Favretti, Rudy & Joy Favretti
1991  Landscapes & Gardens for Historic Buildings. American Association for
State & Local History Book Series.

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At 07:11 PM 3/9/01 -0500, you wrote:
>Dear All:
>
>I am interested in finding references regarding the use of plants as clues
>for site identification.
>
>Are there certain kinds of plants that tend to colonize structure sites?
>
>What sorts of domesticates and exotics were most common around homes at
>various times (e.g. boxelder, perry winkle, English ivy)?
>
>Once the types of plants to look for have been named, is there a
>particularly good book to help with identifying these species in the field?
>
>Thank you in advance for any words of wisdom.
>
>Cheers,
>Ben Ford
>_________________________________________________________________
>Get your FREE download of MSN Explorer at http://explorer.msn.com
>
>