Pilularia americana

pillwort
Native

Photos

(c) Paúl Gonzáles (CC BY)
(c) Theo Witsell (CC BY-NC)
(c) 2010 Zoya Akulova (CC BY-NC)
(c) Theo Witsell (CC BY-NC)
(c) Robin Gwen Agarwal (CC BY-NC)