From what little I know of plant biology/nomenclature, this
plant shouldn't
exist as a distinct species. P

A 'species' refers to a group of plants that are reproductively
isolated?

It is NOT a species. It is a crossed hybrid, and it is sterile.
Each of the parents is a species (presumably), but their
offspring is in sexual limbo. ;-)

Jim Lewis - - Tallahassee, FL - "People,
when Columbus discovered this country, it was plum full of nuts
and berries. And I'm right here to tell you the berries are just
about all gone." -- Uncle Dave Macon, old-time musician

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