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hardy  Aroids)" <ARISAEMA-L at NIC.SURFNET.NL> Aroids)" <ARISAEMA-L at NIC.SURFNET.NL>
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From: Barry Yinger <asiatica at NNI.COM>
Subject: Re: gnat pollinators was: What is the name of this plant?
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The first scientific book that presents information on this topic  that
I am aware of is by A.J. Cain, Animal Species and Their Evolution,
(London: Hutchinson and Co., 1954, reprint ed. New York: Harper and
Bros, 1960).

Since then there have been a number of papers in the US, Europe, China,
and especially Japan, but I lost these in the fire last year.  The
Japanese papers are the most interesting.  I literature search of
scholarly papers in the field of plant science will find many of them.

On Apr 1, 2004, at 10:47 PM, Pacific Rim wrote:

> Barry, where has the gnat-pollination of Asarums been published,
> please? The
> notion is very pleasing.
>
> Where I am, in southwestern British Columbia, many Asarum spp. and
> their kin
> have produced flowers in the past few weeks; this is also the season of
> billows of tiny, almost invisible gnats.
>
> Supplementary question: Do we still believe that ants distribute the
> seeds?
> From observation that seems plausible, but the gnats are new and
> delightful.
>
> Paige Woodward
> paige at hillkeep.ca
> www.hillkeep.ca
>
> ----- Original Message -----
> From: "Barry Yinger" <asiatica at NNI.COM>
> To: <ARISAEMA-L at NIC.SURFNET.NL>
> Sent: Thursday, April 01, 2004 3:09 PM
> Subject: Re: gnat pollinators was: What is the name of this plant?
>
>
>> Various species are more or less discriminating about their
>> pollinator(s).  The plants in subgenera Asarum and Asiasarum are
>> generally less discriminating, and those in subgenera Heterotropa
>> (Japan and China) and Hexastylis (America and maybe China) are more
>> specific.  Chinese and Japanese species in subgenus Heterotropa rarely
>> spontaneously set seed in cultivation.
>>
>> Barry Yinger
>>
>> On Apr 1, 2004, at 4:58 PM, Marge Talt wrote:
>>
>>>> From: Barry Yinger <asiatica at NNI.COM>
>>>> say). Many asarums are gnat specific, which is why many species
>>>> (including splendens) rarely set seed in cultivation.
>>> ----------
>>>
>>> Having been so excited to find slugs were not the pollinators, I
>>> neglected to read all your message carefully.  I am assuming, then,
>>> that the required gnats live in Japan or wherever the country of
>>> origin of a species is?
>>>
>>>
>>> Marge Talt, zone 7 Maryland
>>> mtalt at hort.net
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>>
>>
>