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hardy  Aroids)" <ARISAEMA-L at NIC.SURFNET.NL> Aroids)" <ARISAEMA-L at NIC.SURFNET.NL>
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From: irisman <irisman at AMERITECH.NET>
Subject: Re: any spontaneous hybridization?
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Nice.  I think this helps explain variability, just as variability  shows=up
when the F2 generations are sib-crossed. Just an opinion, --I think I'd l=ike
to hear from Suzanne R.  on this and get some detail on how the research =is
conducted.  i.e., how does one determine which is the more ancient in
lineage, by comparing chromatographs of two extracts.  Is the ordering of
development of plant pigments known ?  regarding which is older?  which i=s
more recent?  How does it work? Adam Fikso





----- Original Message -----
From: "Bonaventure Magrys" <magrysbo at SHU.EDU>
To: <ARISAEMA-L at NIC.SURFNET.NL>
Sent: Thursday, March 14, 2002 7:30 PM
Subject: Re: any spontaneous hybridization?


> Prof. Charles Sheviak published a paper (I think in the American Orchid
> Society Bulletin) in which he discusses the possibility that the member=s
of
> the North American Cypripedium calceolus complex - C. pubescens and C.
> parviflorum - may have evolved from hybrid ancestors crossing the Berin=g
> Sea land bridge during the last ice age from Siberia, where there is mu=ch
> introgression in the Eurasian calceolus from C. macranthos. He sees
> morphological characteristics in the N.A. species similar to that found=in
> the far east hybrid (Cyp. ventricosum) swarm.
>
> I wonder why the North American Arisaema triphyllum has so much
> variability......
>
> Bonaventure