They rarely flowers, and then only with very small flowers, the nut is 4-5 mm. Propagation happens mostly
during the winter with hibernakls (spelling?), which meens that every stemtip hibernates and what betwin the stemtips dies.
Every stemtip will then become a "new" plants in the spring.
C. demersum has dark green shots and its has more stiff and fragile stem and leaves than C. submersum.
Submersum is light green, sometimes reddish leaves, depending on the light.
Martin - Denmark.
----- Original Message -----
From: sorin <sorin_at_imajis.com>
To: <nanfa_at_aquaria.net>
Sent: Sunday, January 21, 2001 11:31 AM
Subject: Re: NANFA-- Hornworts- Ceratophyllum
>
>
> Jeffrey Fullerton wrote:
> >
> > I am trying to figure out hornworts.
> > There are two types present in my pond - one is a large, dark green and
> > the other is a smaller lighter green. I've browsed the web looking at
> > illustrations but they are confusing. Apparently there are three
> > species. A big one. A medium sized one and a really diminitive one.
> > There are also three names floating around - Ceratophyllum demersum -
> > which is supposed to be the larger species , C. submersum - the medium
> > and C. echinatum - the smaller or "Spiny Hornwort". Still I am confused
> > about the genus - especially the two larger forms.
>
> Jeff, there is only one genus you can confuse Ceratophyllum with. It is
> Myriophyllum, and there is an empirical way to separate them.
> Ceratophyllum leaves are harsher when touched, stiffer, because they
> have more calcium in the tissue. This is an empirical approach, but good
> enough to separate the two genera.
> I can tell you exactly what do you have, at least the genus, if you can
> post somewhere or email mi pics or a scan of leaves. No need to take
> pictures, just cut a leaf swirl above and bellow a node and scan it.
> Hope it helps
> sorin damian (new around)
>
>
> Never had or seen the
> > very small one.
> >
> > Anyone out there have a handle on hornworts?
> >
> > Jeff
> >
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/"Unless stated otherwise, comments made on this list do not necessarily
/ reflect the beliefs or goals of the North American Native Fishes
/ Association"
/ This is the discussion list of the North American Native Fishes Association
/ nanfa_at_aquaria.net. To subscribe, unsubscribe, or get help, send the word
/ subscribe, unsubscribe, or help in the body (not subject) of an email to
/ nanfa-request_at_aquaria.net. For a digest version, send the command to
/ nanfa-digest-request_at_aquaria.net instead.
/ For more information about NANFA, visit our web page, http://www.nanfa.org