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Re: [APD] RE: Blyxa

Hello Tom,
I have had annuals grow for much longer when you take away the triggers that
make them flower and die off.   Ottelia alismoides (I think you guys treat
it as a weed) generally only grows for a year but I had one in an aquarium
growing for two and a half years before it died.

Bnlyxa aubertii is a very common plant here around the top end of Oz but it
does not have much choice about dying off each year.   We get about 80
inches of rain in three months, the rains start in December and are
generally finished by March.   Everywhere is in flood.   The waters drain
away by about July. The Blyxa survives through dry season in some permanent
waters but by about October it looks terrible with ratty leaves and lots of
flowers.  Even in those places that have water all year the quality is bad
for plants by the end of the dry season.   Perhaps some survive through to
the next wet season.

Perhaps some of these so called annuals have a set lifetime that can cover
more than one season if conditions are suitable for them to keep growing.
Next time I am in the NT Government Herbarium I will ask the Water Plant
botanist there, Ian Cowie.   He is a whiz with water plant knowledge.

Dave in Darwin

On 19/6/05 2:44 AM, "Thomas Barr" <tcbiii at earthlink_net> wrote:

>>> It stopped  flowering, started
>>> "melting", and in three more days was nothing but mush.   The only thing
> that
>>> changed was that some duckweed had partially shaded it,  although not
>>> completely.  Any ideas?
>> The vegetative phase->flowering phase->death in annuals that I know of is
>> irreversible. If I want to keep any plant I knew is an annual growing
>> perpetually I would _not_  give it the conditions it needs to start flower
>> initiation. This depends on the species and where/when it grows in nature.
>> Daylength, temperature, light intensity, water level, nutrient levels are
> the
>> usual parameters.
>> regards
>> Stephan
> Yes, sub optimal growing conditions and the duckweed will have a bad effect
> on many plants that like light.
> You reduce the ability of the plant to make food basically after going
> along at full bore.
> Some plants are not as picky, but my Blyxa flowered most of the time, no
> melt of die back.
> If it occurs as stated, why are my plants fine after 2-3 years and 1 year
> of flowering(continuously)?
> Are mine semi annual?
> Sort of annual?
> This maybe true for many Aponogetons, but less so for this plant.
> Even the Apono's are good if kept cool, my Blyxa wasn't kept cool though,
> it was hot every summer.
> Regards, 
> Tom Barr
> 3rd annual Plant Fest July 8-14th 2005!
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