Wolffia is a simple plant with a limited number of cells and structures. (A) Brightfield image of wa8730. A video with time tracking of the asexual propagation of wa7733 in culture can be found in the Supplemental Material. (B) Phylogenetic relationship between representative species from the five genera of duckweed. Each color represents a distinct genus. Modified from Borisjuk et al. (2015). (C) Cross section (1-µm-thick section) of W. australiana stained with methylene blue: (mf) Mother frond; (df) daughter frond; (gdf) grand-daughter frond; (ep) epidermal cells; (ch) chlorenchyma cells; (pa) parenchyma cells; asterisks indicate some of the stomata; (st) stipe tissue.
