|Water chestnut rosette, top. Each plant can create up to 5-10|
rosettes; each rosette creates 5-15 seeds.
|Water chestnut rosette from underneath. Note air-filled|
bladders on stems, to keep the plant floating. Seeds not yet created.
|Filling baskets with water chestnut, Assabet River 2015. By the end of|
the day's efforts this patch was all pulled up and disposed of.
|Water chestnut seed pod that had not sprouted, and instead had|
dried and floated to the surface. Very sharp and very hard.
Major puncture wound likely if stepped on barefoot.
(Click on any photo to enlarge.)
Locally, mechanical harvesters have been needed on badly impacted parts of the
OARS volunteers were out in boats again in July 2016, removing water chestnut from the section of the Assabet River between Maynard and the Powdermill Dam, in Acton.