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  Re: How big is big enough? and how tall do they get?
From: "Julius Boos" ju-bo at msn.com> on 2002.04.15 at 02:50:46(8550)
----- Original Message -----
To: Multiple recipients of list AROID-L
Sent: Sunday, April 14, 2002 12:37
Subject: Re: How big is big enough? and
how tall do they get?

Dear Bernhard and randy,

This is going to be a MOST difficult one
to determine! Aroids are strange plants, and some will bloom
at a VERY early age/size, even the giant species! There are two
pages linked to the MOBOT aroid pages detailing two different A. titanum`s
that bloomed at a very small tuber size, and several other species (A. konjac
among them) have also bloomed when small/young. Cyrtosperma
cuspidispathum has been recorded blooming when only 6 " tall, this plant can
and will grow to over 3 m tall! Perhaps a big part of the
joy of growing these plants is in the 'surprise' of never knowing for sure
exactly when one will produce a bloom!!
This brings me to once more mention
something that has not been well recorded for most aroids, which is the
production of inflorsences by small or weak plants that only contribute pollen
to the reproductive 'chain'/gene pool. This is well recorded in
the genus Arisaema, where the 'normal' unisexual spadices (male above female
separate floral zones) are modified, the female zone is lacking in the flowers
borne by smaller, weaker plants, and these can only contribute pollen to the
gene pool, as these small plants do not have the tuber size/stored 'energy' to
be able to sustain an infructesence through it`s lengthy
development. I strongly believe that this occurs (does anyone
have records or references to this??) in genera that have bisexual spadices
such as Anthurium and Urospatha, Anaphyllopsis ond others. A
small, weak plant will bloom, but will only produce pollen. If
fertilized the fruit can and will not develop as the smaller weaker plant can
not sustain a developing infructesence.
Anyway, good luck with your quest for
information on blooming size, and the use of growth retardant on giant species
of Amorphophallus, though this aspect baffles me, I thought that the whole
'point' of obtaining a giant species was for it to grow TALL/BIG!

Best Wishes,


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