Sub surface flowers

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Thats really interesting about the vallis.and sea grasses. I wonder what the trigger for flowering is? I had always read / assumed that propagation was solely through runners. Does anyone else know of any other examples?
 

Tim Harrison

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Take a look at this article Underwater Pollinators.
Thats really interesting about the vallis.and sea grasses. I wonder what the trigger for flowering is?
I'm not sure exactly but Vallisneria spiralis would flower regularly in my low energy, which would suggest nothing very much in particular. Although I'm guessing daylight length and light intensity would be the usual triggers.
 
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