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Subject: Ceratopteris thalictroides
>A couple of months ago I bought at a club auction several samples of the
>broad-leaf variety of water sprite (Ceratopteris thalictroides, right?).
>It has been doing very well (I grow it floating) and, as expected,
>several aerial branches were sent out. I recently noticed that one of
>the plants has generated an emerged branch that looks quite different:
>instead of the expected broad, fringed leafs, it has thick (round
>section), narrow and pointy, almost needle-like leaves (it's hard to
>explain in writing how they look). Is there anyone that can explain to
>me what is the reason for this change? The other water sprite plants
>nearby are perfectly "normal".
The growth you describe is absolutely normal emersed growth. Another
common name for this plant is "Horn Fern", which I think is quite descriptive.
Aquatic Gardeners Association