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[aroid-l] bracnhing petiols

Hiya All

There are leaves that SEEM to have branching petioles - Pentaphragama does
it as does Cyclanthaceae and a few other families - but what is actually
happening is the leaf blade 'forgets' (Wilbert please forgive the
teleology!) to develop along all the ribs and thus ending up with a leaf
that looks like it has a branching petiole.


----- Original Message -----
From: "Wilbert Hetterscheid" <hetter@worldonline.nl>
To: <aroid-l@lists.ncsu.edu>
Sent: Sunday, August 17, 2003 8:24 PM
Subject: Re: [aroid-l] How many leaves??

> Dear Dietmar & Margret,
> I did tell you about multiple leaves but NEVER about branching petioles.
> That just doesn't happen in this world unless it is a "Lusus Naturae" (a
> freak!).
> Cheerio,
> Wilbert
> > -----Oorspronkelijk bericht-----
> > Van: aroid-l-owner@lists.ncsu.edu
> > [mailto:aroid-l-owner@lists.ncsu.edu]Namens Dietmar Kiehlmann
> > Verzonden: zondag 17 augustus 2003 13:23
> > Aan: aroid-l@lists.ncsu.edu
> > Onderwerp: Re: [aroid-l] How many leaves??
> >
> >
> > Some weeks ago, we observed on one of our Am. bulbifer
> > that a second petiole emerged about 4 cm above the soil
> > from the existing petiole. Later, this second petiole broadened
> > downwards, as shown on the picture. The arrow indicates
> > the original emerging point. Hence branching of petioles is
> > possible within the genus Amorphophallus and, as Wilbert
> > wrote to us, is also known e.g. from A. paeoniifolius and
> > A. glossophyllus.
> >
> > Best regards
> > Margret & Dietmar Kiehlmann

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