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Re: Crispus and CO2 longevity

Alysoun McLaughlin & Andrew Blumhagen wrote Friday, Dec. 4:

>Subject: Crispus and CO2 longevity
>I've had A. crispus for about a year and a half.  It was constantly
>sending up spikes, even sending up two spikes at once, until I finally
>let it seed.  The seed developed and sprouted right on the flower, and
>the seed never dropped off.  The mother plant then went very quiet,
>although it continues to send up replacement leaves (still hasn't sent
>up another spike, and it's probably been six months by now).
>Rather than try to separate the seed from the stalk, I snipped off a
>section and planted it.  The stalk disintegrated, and the tiny crispus
>masqueraded as dwarf sag for six months -- in fact, when I transferred
>all the plants to a larger tank, I studied each small piece of sag
>carefully to try and find the crispus.  I couldn't find it, and assumed
>I'd buried and killed it.
>Sure enough, though, within a week of adding CO2 to the tank, a crispus
>sprouted out of the sag patch.  It's growing quickly.

--------<remainder snipped>------------

This doesn't sound like an Aponogeton seed.  Seeds fall off of the stem of
the flower and float for a day or two before sinking and then sprouting.
It sounds like you have Aponogeton undulatum, instead of crispus. A.
undulatum forms plantlets by vegetative (asexual) reproduction from the
flower spike.  Along with the plantlet, a small tuber forms, which stays
stuck to the flower spike for a month or two before falling off.  I'll bet
you have A. undulatum.  Its leaves are quite similar to those of A.

Paul Krombholz, in moist, cloudy, central Mississippi