Just Dioscorea

Adam Fikso adam14113@ameritech.net
Fri, 02 Jul 2010 15:12:33 PDT
Well, Jim.  I wish you wouldn't unsubscribe.  You're one of the best 
informed folks around, and I for one will miss your knowledge base, 
informational input, and occasional gentle humor.
----- Original Message ----- 
From: "? ?" <atlas_titan@hotmail.com>
To: <pbs@lists.ibiblio.org>
Sent: Friday, July 02, 2010 5:00 PM
Subject: Re: [pbs] Just Dioscorea


>
> I wish to unsubscribe from this list. Thank you!
>
>> From: jimmckenney@jimmckenney.com
>> To: pbs@lists.ibiblio.org
>> Date: Fri, 2 Jul 2010 11:12:08 -0400
>> Subject: Re: [pbs] Just Dioscorea
>>
>> I'll bet the one in your garden is Chinese yam, Dioscorea oppositifolia
>> (widely known as D. batatas). It's a terrible pest in many areas and is
>> widely considered to be "officially" invasive in some states. This 
>> species
>> forms large tuberous roots and small aerial tubers. I've never seen a
>> variegated form however. This species and D. japonica are similar, 
>> although
>> web photos of D. japonica show very upright conspicuous spikes of 
>> flowers.
>>
>> The ones you saw with big aerial tubers might have been D. bulbifer.
>> According to the wikipedia account, the tubers of this one range from 
>> edible
>> if boiled to toxic. It is probably not hardy northward but is feral in
>> Florida.
>>
>> Jim McKenney
>>
>>
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