Rafts of duckweed – a sign of fall

Duckweed on the Hudson River, September 2015. (Photo by John Lipscomb / Riverkeeper)
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We’re seeing big rafts of Duckweed now from about Bear Mountain way up to Catskill. It’s fluorescent green, beautiful.

It’s being released from the marshes as water chestnut and other vegetation break loose at the end of the season. Once exposed to tidal current, off the Duckweed goes.

“The flower of the duckweed genus Wolffia is the smallest known, measuring merely 0.3 mm long.”