[Taxacom] Fossil Plant IDs

[Thomas G. Lammers]

At 10:21 AM 4/9/2007, Herbarium wrote:

>A colleague of mine is writing a book on the various types of rock used in
>building construction in the U.S.  He would very much appreciate any
>insights others may have on the genera of plants shown in the image links
>provided below.  They are from travertine rock quarried from Italy.
>    For background info, he says, "In terms of depositional environment, the
>travertine was deposited in Tivoli, about 20 miles east of Rome, roughly
>250,000 to 140,000 years?ago. The rock is still being deposited there in
>hot springs. I don't?have any more specific dates than these. The springs
>generated lakes,?ponds, and swamps, where deposition occurred.
>
>http://www.seanet.com/~wingate/pre_2005_site/urban.html
>(you'll need to scroll down a bit to see this one)
>
>http://academic.reed.edu/getty/travertine/Trav-18.s.html
>http://academic.reed.edu/getty/travertine/Trav-17.s.html
>
>    Any help is much appreciated.


Just a guess, but they remind me of Populus nigra.


Thomas G. Lammers, Ph.D.

Associate Professor and Curator of the Herbarium (OSH)
Department of Biology and Microbiology
University of Wisconsin Oshkosh
Oshkosh, Wisconsin 54901-8640 USA

e-mail:       lammers at uwosh.edu
phone:      920-424-1002
fax:           920-424-1101

Plant systematics; classification, nomenclature, evolution, and 
biogeography of the Campanulaceae s. lat.

Webpages:
http://www.uwosh.edu/departments/biology/Lammers.htm
http://www.uwosh.edu/departments/biology/herbarium/herbarium.html
http://www.geocities.com/TheTropics/Resort/7156/lammers.html
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