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From: "StroWi at t-online.de" <StroWi at t-online.de>
on 2013.06.02 at 08:52:44|
thanks for the explantion.
our very observant amorphophallus.forum.de member olvi who grows his
'Indian Giant' in Helsinki that his thoughts went to the right
So it's a vertical rhizome and not what we call in
German "Wechselknolle" known for instance from Crocus; or is
the 'tuber in Crocus also a vertical rhizome?
> Date: Sat, 01 Jun 2013 12:38:28 +0200
> Subject: Re: [Aroid-l] Fwd: FW: Re: =A0Message from Bernhard about
> From: "Wilbert Hetterscheid" <email@example.com>
> To: "'Discussion of aroids'"
Such a mark is the scar of the previous inflorescence
(-peduncle). It is also a clue as to the "new"tuber is built
from the previous one. The old one is obviously not just "swallowed
up" by the new growth but only partly and then new tissue is added.
It is in fact a vertical rhizome, that builds a new module every year
and discards of most of the pre-last module in the process but not all
thanks for your explanations and your
points illustrated by your "ballon"picture of the meristem/growing point describes nicely what my picture of the growing of a Typhonium
tuber was or still is.
I notioced the
remains of the old not
totally consum tuber at
the very bottom of the tuber or below the new grown tuber
the end of the growing season as well.
However, I cannot follow your suggestion on the marks
our very observant member olvi found.
very simple reason is that
exactly one mark is
found on one tuber that is big enough to have had a
flower at the begining of the growing
I attachhed a picture
of some of my Sauramatum (syn. Typhonium)
venosum 'Indian Giant'
.The marks Olvi found are "marked" with
The very odd thing
is that always only one of these marks is found on a
tuber and interestingly
always on at more or
less the same position.
this speaks strongly
against your suggestion of a
coincidential occuring rot of an offset. In other words, why should it always be one rooting offset (and not more) and alway in
a position obove the "level" where the new offsets grew (I broke off the new offsets; those are the
But what would then be an reasonalbe explaination for these marks?
BTW, the small
tubers infront of the big ones in the
picture have not had a flower
(bud) at the beginning of the growing
season and such samll tubers never
show these marks.
I still wonder, if the marks can be associated with the
peduncle from the beginning of the
Still looking forward for any comment........ maybe
from Lord P(ure Wisdom) or any
> Date: Tue, 07 May
2013 20:46:20 +0200
> Subject: Re: [Aroid-l] Message from
Bernhard about Typhonium
> From: "D. Christopher
> To: Discussion of aroids <firstname.lastname@example.org
I think that
you mean the mark that would appear to be a depression in the side of
the tuber. If that is the case, I think that is where and offset was
released, and some rot occurred at the union and then healed.
I have had plants of this species and some Amorphophallus that would
occasionally not completely consume the old tuber. However, the remains
of the old tuber were always directly below the new tuber. The central
primary growing point of the plant is that central point, surrounded by
the primary roots, =A0where the leaf and inflorescence grow up and the
tuber shrinks and and regrows from the bottom. This is the apical
meristem, and the leaf and inflorescence will always grow from that same
spot, year after year.
Remember that as the
inflorescence and leaf grow, the tuber shrinks towards the meristem,
like a deflating balloon. =A0It regrows in the same way, expanding outward
like a balloon from that same point. It is not like Anchomaenes or
Gonatopus, where leaves can grow anywhere over the upper surface of the
tuber and the tuber is not completely consumed.
really hope that this helps!
D. Christopher Rogers
Taxonomist and Ecologist
Kansas Biological Survey
University, Higuchi Hall
2101 Constant Avenue, Lawrence, KS
Southwest Association of Freshwater Invertebrate
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