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  Re: Making bulbils?
From: "Eduardo Goncalves" edggon at hotmail.com> on 2002.06.05 at 20:18:01(8961)
Dear Randall,

Well, we still do not have a good published phylogeny for the aroids
(despite it is on its way), but it seems that this feature is not so unusual
in the "higher aroids". It is known in a few Amorphs, Pinellia and, believe
me, in a Xanthosoma from Peru! This species (not yet published - Josef
Bogner will publish this one) produces a tubercle at the junction of
leaflets (just like Amorphophallus symonianus), deeply immersed in the
tissue. All of these taxa are from the clade "Aroideae" presented by James
French, so it may not be such a rare thing (or appeared independently at
least 3 times in this subset the family). Anyhow, the tendency for easy
"totipotence" is common in plants with succulent tissues and many aroids are
quite succulent indeed. All you have in "bulbifer" aroids is a small
specialization of an widespread feature... Remember that Gonatopus and
Zamioculcas do not produce spontaneous tubercles, but will start to swollen
any portion of it if you put it in contact with anything that could be
called soil!

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