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  Re: [Aroid-l] Sauromatum x Pinellia hybrid.... and others...
From: James Waddick <jwaddick at kc.rr.com> on 2010.07.07 at 19:03:55(21162)
> I've posted images of the flower this spring, and the plant as it
>currently grows in comparison with both putative
>parents, Sauromatum venosum and Pinellia pedatisecta.

Dear Tony
This is a fascinating topic. As you probably know both
Sauromatum venosum (aka Typhonium) has a chromosome number of 2N= 26.
This is the same for Pinellia pedatisecta and some (but not all )
others in this genus ie 2N = 26

I realize that chromosome nos. of themselves has little
meaning, but suggests a likelier road to hybridization.

In your differentiation of these two species you did not
mention what seems the easiest and most consistent feature- petiole
pattern. In Sauromatum the petiole is more or less heavily brown
spotted and blotched, while Pinellia pedatisecta has no spots and is
uniformly green. I have a hard time keeping Sauromatum alive
outdoors in the ground, but somehow tubers pop up in pots as do
Pinellia. The petiole pattern is always a dead give away even on
small plants.

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