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  Xanthosoma violaceum
From: David Thornton <dave at dave-aroid.demon.co.uk> on 1998.10.19 at 19:41:59(2705)
Dear aroiders Does X violaceum, grown as a houseplant, min. 65,have a
dormant winter period due to short day lengths. My plants, newly
acquired, are dying back


From: "Agoston Janos" <agoston.janos at citromail.hu> on 2006.12.23 at 15:59:46(15006)
Hi All,

Is that true Xanthosoma violaceum never flowers? Has anybody
seen it in flower?


From: "Peter Boyce" <botanist at malesiana.com> on 2006.12.23 at 22:39:43(15010)
Hi Jani

What we call X. violaceum here in Sarawak
(cultivated for its tubers) flowers regularly.


From: Gartenbau Reisenberger <gartenbaureisenberger at web.de> on 2006.12.24 at 14:49:05(15014)
Hi Peter, Hi JaniIŽve once learned, there is a difference beetween Xanthosoma violacea and X. nigra, the first with green leaf stalks, greenleaves and a purple hue over the green, the latter with very dark purple petioles. Is that correkt?Some of our X. nigra are regularely flowering in our greenhouse in Vienna. Next time IŽll take a picture.Seasonal greatingsHelmut Reisenberger Von: Discussion of aroids Gesendet: 24.12.06 08:24:47An: "Discussion of aroids" Betreff: Re: [Aroid-l] Xanthosoma violaceumHi Jani What we call X. violaceum here in Sarawak (cultivated for its tubers) flowers regularly. Peter----- Original Message ----- From: Agoston Janos To: AROID-L Sent: Saturday, December 23, 2006 11:59 PMSubject: [Aroid-l] Xanthosoma violaceumHi All, Is that true Xanthosoma violaceum never flowers? Has anybody seen it in flower? Bye,Jani_______________________________________________Aroid-l mailing listAroid-l@gizmoworks.comhttp://www.gizmoworks.com/
From: "Julius Boos" <ju-bo at msn.com> on 2006.12.24 at 18:18:10(15015)
Reply-To : Discussion of aroids
Sent : Sunday, December 24, 2006 2:49 PM
To : Discussion of aroids
Subject : Re: [Aroid-l] Xanthosoma violaceum

Hello Helmut, Peter and Jani,

Helmuts report (below) clarifies what I am trying to say. The plant that he
is calling X. 'violacia" (w/ dark green leaf stalks, and with green leaves
and with a purple hue over the leaves) sure sounds like to 'new' one from
Cen. America which I reported in my earlier post, and Eduardo ID`d it from a
photo sent in as NOT being X. violacium, but another 'good' species like X.
sagittifolium, I don`t remember exactly which.
The second which Helmut is calling X. 'nigra' with the very dark purple
petioles I THINK is what we have being called X. violacium! BUT---until
Eduardo gets his review of the cultivated forms/species of Xanthosoma
completed, we shall always remain in doubt!
Helmut, please if at all possible post photos of these plants to the aroid-l
and we can all take a look at them, and perhaps Dr.Goncalves can give us his

The Best,


From: "mossytrail" <mossytrail at hctc.com> on 2006.12.25 at 21:32:17(15021)
> Date: Sun, 24 Dec 2006 18:18:10 +0000
> From: "Julius Boos"
> Subject: Re: [Aroid-l] Xanthosoma violaceum
> To: aroid-l@gizmoworks.com
From: "Eduardo Goncalves" <edggon at hotmail.com> on 2007.01.06 at 02:40:17(15044)
Dear friends,

I am leaving the city for two weeks for vacancy (2006 was a crazy
year indeed), but I will answer this post first. Xanthosoma violaceum
flowers regularly in Brazil and maybe in other places too. However, it
rarely flowers if kept in pots. You can see the flowers of the true species
in the Genera of Araceae book (by Mayo, Bogner and Boyce). When it decides
to flowers, it can produce up to 10 inflorescences per plant, that are pale
yellow with pinkish edges. Usually flowering plants have a long creeping
stem instead of the corm of the young form.
By the way, Chlorospatha croatiana flowered for me for the first
time this month. The inflorescences are somewhat twisted... What a lovely
plant... It is a pity that it is hard to find species of this genus to
cultivate and they are not native to Brazil. I would love to have more
around!!! One of the plants of Caladium tuberosum (I just brought from the
field) seems to be flowering too. Very nice!!!
I will ask a little patience for those that have tried to contact
me for these times. One of those new year promises I made to myself it was
to be able to answer emails in real time again, as I used to do some years
ago. I will try do it when I am back from the shore... Until there, I will
try to stay clean and be out of aroids for some time!

Very best wishes,


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