Article Nº 2770 Plant Vol. III · p. 92
Duckweed (Lemna gibba)
Original title: Pastinha-de-Água (Lemna gibba)
Duckweed (Lemna gibba), a small floating plant common in Madeira's streams, ponds and tanks, also called lentilha-de-água.
A plant of the family Lemnaceae, common in the streams, ponds and tanks of Madeira. It has small fronds each bearing a single root, and is also known by the name lentilha-de-água (see that entry).