Re: SPEC-setosa/hookeri
- To: Multiple recipients of list <i*@rt66.com>
- Subject: Re: SPEC-setosa/hookeri
- From: B* S* <b*@tiger.hsc.edu>
- Date: Thu, 18 Dec 1997 12:26:04 -0700 (MST)
>Bill and Ian,
>Do you think that the tridentata ancestor may have been shoved down
>the middle of the continent by the last glacier and had to evolve
>more to adapt to the climate that developed in the south? Did the
>glacier(s) come down that far?
>
The last glacial maximum angled down into northern PA, across central OH,
IN and IL, then cut NW. There was evidently a large unglaciated area in
central Wisconsin (called the Driftless Area). Your idea may be right.
But today tridentata occurs mostly in the south Atlantic coastal plain.
I still think it legitimate to question its relationship to setosa/hookeri.
Bill Shear
Department of Biology
Hampden-Sydney College
Hampden-Sydney VA 23943
(804)223-6172
FAX (804)223-6374
email<bills@hsc.edu>
