transitive law of hybridization

Dennis Kramb
Mon, 05 Sep 2011 08:54:47 PDT
I assume such a law doesn't really exist.  However, I just realized something.

There's "lots" of hybrids between Manfreda and Agave.
And there's also hybrids between Manfreda and Polianthes.

So are there any hybrids between Agave and Polianthes?

Google seems to say that Manfreda and Polianthes used to be lumped
into Agave.  But I am talking about Polianthes and Agave as they exist
today.  Are there hybrids between the two?  (Like P. tuberosa and A.
americana, or whatever)

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