*Murdannia keisak (Hasskarl) Handel-Mazzetti. Phen: Sep-Oct. Hab: Stream banks, canals, ditches, freshwater marshes (tidal and non-tidal), swamp forests, wet disturbed places. Dist: Native of Asia, now widespread in the se. United States. M. keisak was introduced to SC and LA in the 1920s and 1930s, probably as a contaminant in rice seed, but the seeds now distributed by water and waterfowl; it is now a very serious invasive in a wide range of wetland habitats (Dunn & Sharitz 1990).
Origin/Endemic status: E. and se. Asia
Synonymy: = Ar, C, FNA22, G, GW1, K1, K3, K4, Tn, Va, W, WH3, Pellegrini, Faden, & Almeida (2016), Tucker (1989); = Aneilema keisak Hassk. – F, RAB