$modus 0: smartphone
$modus 1: smartphone
Wolffia columbiana
Wolffia columbiana Karsten [Accepted]
Lemnaceae
1075288
Wolffia columbiana Karsten
Annual Rep. Missouri Bot. Gard., vol. 9 : t. 4, fig. F (1898)
Wolffia columbiana Karsten
D.S. Correll, H.B. Correll, Aquatic Wetl. Pl. SW U.S.: , fig. 295 e-g (1972) [unsigned]