I'm not sure how botanists divide up the zones in the New World. Zoologists (used to, anyway) distinguish between the Nearctic (north temperate) and Neotropical zones. Since I started out expecting to be a zoologist, that's still how I think of things. The Flora of North America seems to stop at the Mexico-USA border. Where are all our experts when you need one? Jim Shields At 12:28 PM 3/25/2010 -0700, David Ehrlich wrote: >I was taught that Mexico is part of North America; it has always been part >of the North American continent; it did not attach like the rest of >Central America. As to fauna, I believe the major migration was from >North America southward. > >________________________________ >From: "Lysne, Mark (Wyle)" <LYSNEM@ONR.NAVY.MIL> >To: pbs@lists.ibiblio.org >Sent: Fri, March 19, 2010 5:47:43 AM >Subject: Re: [pbs] pbs Digest, Vol 86, Issue 32 > > >Message: 13 >Date: Thu, 18 Mar 2010 21:41:06 -0400 >From: "Jim McKenney" <jimmckenney@jimmckenney.com> >Subject: Re: [pbs] Native N American crops >To: "'Pacific Bulb Society'" <pbs@lists.ibiblio.org> >Message-ID: <6FCE6BF68FB44DDD81C5574016E506A8@Library> >Content-Type: text/plain; charset="iso-8859-1" > >Well Leo and Alberto, I think the answer to this one depends on how you >divide up the Americas! > >For those who divide things up into North America and South America, >then >both of you are right. > >I was thinking in terms of North America, Mesoamerica and South America. >That division is I think more common in biological discussions because >of >the huge differences introduced by the Mesoamerican fauna. >...... ************************************************* Jim Shields USDA Zone 5 Shields Gardens, Ltd. P.O. Box 92 WWW: http://www.shieldsgardens.com/ Westfield, Indiana 46074, USA Tel. ++1-317-867-3344 or toll-free 1-866-449-3344 in USA