Question about Naked Ladies
J.E. Shields (Fri, 21 Dec 2007 05:18:41 PST)
David,
One expression for this that I recall is Rassenkreis, a breeding or racial
circle or arc. I think I have seen "cline" applied to the sort of
variational gradient you describe. We still someone who knows for sure to
enlighten us!
Jim Shields
At 07:04 PM 12/20/2007 -0800, David wrote:
There is a botanical word I'm looking for it's something like gradient,
but I don't think that's the word. It is used when referring to a species
with a broad distribution which has one form at one end of its
distribution and a very different form at the other end. The two extreme
forms are sometimes considered separate species. But when the
distribution is continuous and every intermediate form is found and there
is no bar to interbreeding, this special word is used, and the population
is considered a single species with disparate extreme forms
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