Habitat Zones?

J.E. Shields jshields@indy.net
Thu, 25 Mar 2010 14:35:26 PDT
Hi Alani,

Right, including  Hymenocallis, to name one of my favorites!

I would hypothesize that botany professors and their PhD students need to 
delimit their areas of specialization to something doable in 4 or 5 years, 
hence Habitat Zones.   People writing Floras also need to set practical 
limits to the geography they cover.  I wish FNA covered Mexican geophytes.

Genera may be widely distributed, but the species seem to be much less 
so.  I am interested in Hymenocallis species and Hippeastrum species from 
wherever they grow.  I limit my interest in African Amaryllidaceae more or 
less to what is found in the Republic of South Africa and Namibia.  Even 
then, it takes 4 greenhouses to hold what I am interested in.

Jim S.

At 05:19 PM 3/25/2010 -0400, you wrote:
>"The Flora of North America seems to stop at the Mexico-USA border.
>Where are all our experts when you need one?"
>Which part of the North American flora stops at the Mexican United States?
>There are many genera that bridge that artificial line. Oaks, pines, maples,
>magnolias, Mahonia, all occur on both sides and in some cases the same
>species and there are plenty of others that don't range widely in the
>northern United States but occur throughout the southeast and southwest U.S.
>If I have the correct greatest diversity of Pinus and Quercus species in the
>world is found in Mexico. Another interesting twist, the cycad genus,
>*represented by several species in Mexico, Guatemala, and Belize is
>represent in fossil form from Alaska. Seems to me there is a fairly amount
>of moving around.
>Alani Davis

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

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