Wolffia Horkel ex Schleid (Araceae)

Wolffia arrhiza 1 Stjärneholm, Skurup Sk 140914 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Wolffia arrhiza 2 Stjärneholm, Skurup Sk 140914 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Wolffia globosa 1 Copenhagen Bot Garden 120919 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Wolffia globosa 1 Copenhagen Bot Garden 130913 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Wolffia globosa 2 Copenhagen Bot Garden 120919 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Wolffia globosa 2 Copenhagen Bot Garden 130913 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).