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Re: Aquatic Plants Digest V3 #1031

Vallisnaria are at the hieght of thier bloom season in S. Florida during the 
winter, so I would agree that the trigger may be photo period. The female 
flower sits poised at the surface of the water waiting for the pollen pack or 
ball to float to it and is captured by the flower using the surface tension 
of the water. When in bloom in the wild, the Vall forests are covered in 
clouds of these pollen packs as they float to the surface from the base of 
the male plants. The little fish find them tasty also. It's quite a site.