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[Aroid-l] Fwd: FW: Re: Message from Bernhard about Typhonium
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From: "D. Christopher Rogers" <branchiopod at gmail.com>
on 2013.05.29 at 13:35:44
Hi Christopher.
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=A0is.
I
notioced the remains of the
old not totally consum
tuber at the very bottom of the tuber or
below the new grown tuber
at
the end of the growing season as well.
However, I cannot follow your suggestion on the marks our very observant member olvi
found.
The
very simple=A0reason 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 season.
I attachhed a
picture of some of my Sauramatum (syn. Typhonium) venosum 'Indian Giant'.
The
marks Olvi found are "marked" with an arrow.
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.
I guess
this s peaks 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 lighter marks).
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.
So I still wonder, if the marks can be associated with the peduncle from the beginning of the growing
season.
Still looking forward for
any comment........ maybe from Lord P(ure Wisdom) or any other botanist?????
Cheers, Bernhard.
-----Original Message----- > Date: Tue, 07 May
2013 20:46:20 +0200 > Subject: Re: [Aroid-l] Message from
Bernhard about Typhonium > From: "D. Christopher
Rogers" < branchiopod@gmail.com> > To: Discussion of
aroids < aroid-l@www.gizmoworks.com> >
Hiyer, Bernhard!
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. I
really hope that this helps! Happy days, Christopher
-- D. Christopher Rogers
((,///////////=3D=3D=3D=3D=3D=3D=3D<
785.864.1714
Crustacean Taxonomist and Ecologist
Kansas Biological Survey
Kansas University, Higuchi Hall
2101 Constant Avenue, Lawrence, KS 66047-3759 USA
=A0
Southwest Association of Freshwater Invertebrate Taxonomists SAFIT.ORGHC SVNT CRVSTACEORVM
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