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Re: [aroid-l] Xanthosoma "roseum"

  • Subject: Re: [aroid-l] Xanthosoma "roseum"
  • From: Tom Croat Thomas.Croat@mobot.org
  • Date: Fri, 31 Jan 2003 14:16:44 -0600

Dear Eduardo:  I agree that X. roseum is likely to be a synonym.  It will be
good to get rid of the name. Frankly I have never seen a spathe that was
pinkish in any Xanthosoma, certainly not at anthesis but the sterile male
flowers of X. robustum are often pinkish.


-----Original Message-----
From: Eduardo Goncalves [mailto:edggon@hotmail.com]
Sent: Thursday, January 30, 2003 5:17 PM
To: aroid-l@lists.ncsu.edu
Subject: Re: [aroid-l] Xanthosoma "roseum"

Dear Tom,

    Yes, X. robustum is the only big Xanthosoma widespread in Mexico. I have

seen it from Mexico City to Chiapas and probably it ranges down to Costa 
Rica. Xanthosoma roseum is not the older name. Xanthosoma robustum were 
described in 1853, whereas X. roseum was described in 1858. I am treating 
them as synonims, since the stated differences between them are within the 
variation range of X. robustum. Many species were determined as X. roseum, 
only because they have a pinkish spathe or a pinkish sterile portion of 
spadix. The feature is known for X. robustum, X. blandum, X. mafaffa and X. 
sagittifolia, so it is not a good diagnostic feature.

                         Very best wishes,


>Dear Eduardo:
>	I have finally concluded that Xanthosoma robustum is widespread in
>Mexico.  I am treating it in my Flora del Bajia which is an area made up
>partly of Colima, Guerrero and Michacan.  It also ranges into Guatemala 
>probably all the way to Costa Rica according to Mike Grayum).
>Are you saying that X. roseum is an older name and that it should take
>precedence?  We have material in our herbarium called X. roseum cultivated
>in Hawaii which is not the same species (though I am uncertain of the
>correctness of the determination).
>-----Original Message-----
>From: Eduardo Goncalves [mailto:edggon@hotmail.com]
>Sent: Monday, January 27, 2003 12:59 AM
>To: aroid-l@lists.ncsu.edu
>Subject: [aroid-l] Xanthosoma "roseum"
>Dear Susan,
>    The only species that fits this description is Xanthosoma robustum, 
>is, in my opinion, a synonim of Xanthosoma roseum. It ranges from Mexico to
>Guatemala and probably even more to the south. It is widely available in
>Florida as Xanthosoma sagittifolium ("malanga-blanca")!!!! In fact, I 
>able to find a real Xanthosoma sagittifolium growing in Florida!!!
>                       Very best wishes,
>                                         Eduardo.
> >From: snalice@cnmnetwork.com
> >Reply-To: aroid-l@lists.ncsu.edu
> >To: aroid-l@lists.ncsu.edu
> >Subject: Re: [aroid-l] Anthurium regale and Zanthosoma roseum
> >Date: Fri, 24 Jan 2003 13:56:33 -0800
> >
> >Speaking of bigger plants (other than Anthurium) someone sent a photo for
> >ID of a
> >Zanthosoma labled 'roseum' with a man standing under the petiols and the
> >leaves
> >were HUGE and were up three times his height.  I would be interested in
> >knowing
> >if that particular plant was ever ID'd and what was it and is it 
> >anywhere?.....but that's not to say that I don't desire seeds from
> >Anthurium
> >regale!  Beautiful!
> >
> >Susan Cox
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