Phycokey - Aquatic macrophytes

Wolffia

Wolffia arrhiza (smaller leaves) and Lemna minor (larger leaves)
Photo by M. Hassler posted at botanik.uni-karlsruhe.de

Photo by S.I. Winterton, posted at keys.lucidcentral.org
W. brasiliensis (blue arrow) and W. columbiana (white arrow)

Wolffia bloom
Modified from photo by S.I. Winterton

Wolffia bloom along Bennett Road, Durham, NH USA - August 2023
in a backwater tributary to the Lamprey River,

Wolffia bloom along Bennett Road, Durham NH USA - August 2023
in a backwater tributary to the Lamprey River.