SC - cultivar?

[Stefan li Rous]

Ras said: 
> So far as Vidallia being Bermudas...possibly they are a 
> cultivar of them. 

What exactly is meant by "cultivar"? The book on potatoes that I'm
reading uses the term extensively. Is this the same as "species" or
"sub-species"? Or something else?  Is this in plants, like "breed" is
in animals?

Thanks,
   Stefan
- -- 
Lord Stefan li Rous    Barony of Bryn Gwlad    Kingdom of Ansteorra
Mark S. Harris             Austin, Texas           stefan at texas.net
**** See Stefan's Florilegium files at:  http://www.florilegium.org ****
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