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hardy  Aroids)" <ARISAEMA-L at NIC.SURFNET.NL> Aroids)" <ARISAEMA-L at NIC.SURFNET.NL>
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From: "Andy Y.S. Wong" <asiatica at NNI.COM>
Subject: Re: any spontaneous hybridization?
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It should be noted that not everyone agrees that Ariaseama ehimense is a
hybrid of A. serratum and A. tosaense.  From what I have seen in nature
in Shikoku, in Ehime, the two alleged parents are not both present where
A. ehimense is abundant, and in any case do not overlap in bloom, with
tosaense flowering much later than serratum.  It is also hard to explain
the origin of the black spadix seen in many individuals of A. ehimense,
as the two supposed parents in the region do not show that
characteristic.

Barry R. Yinger
Pennsylvania, USA USDA Zone mid 6
Susanne Renner wrote:
>
> The two North American species of Arisaema have been reported to
> hybridizate naturally:
>
> Sanders, L. L., and C. J. Burk. 1992. A naturally-occurring population =of
> putative Arisaema triphyllum subsp. stewardsonii x A. dracontium hybrid=s in
> Massachusetts. Rhodora 94: 340-347.
>
>         Two additional botanists, David Bouffourd from Harvard and Keit=h
> Clay from Bloomington, also have suggested this (in correspondence).
>
>         In addition, Jin Murata and a student have published allozyme d=ata
> that suggest that A. ehimense may be of hybrid origin:
>
> Maki M, Murata J. 2001. Allozyme analysis of the hybrid origin of Arisa=ema
> ehimense (Araceae). HEREDITY 86(1): 87-93.
>
>         I would be very interested in additional reports.
>
> Susanne Renner