''Wolffia angusta'' is a species of flowering plant in the family

Araceae The Araceae are a family of monocotyledonous flowering plants in which flowers are borne on a type of inflorescence called a spadix. The spadix is usually accompanied by, and sometimes partially enclosed in, a spathe (or leaf-like bract). Also ...

. It has been listed by the

Guinness Book of World Records ''Guinness World Records'', known from its inception in 1955 until 1999 as ''The Guinness Book of Records'' and in previous United States editions as ''The Guinness Book of World Records'', is a reference book published annually, listing world ...

as the smallest flowering plant on record, measuring in length and in width. However, more recently ''

Wolffia globosa ''Wolffia globosa'' is a species of flowering plant known by the common names Asian watermeal and duckweed. It is native to Asia and is found in parts of the Americas and Africa, where it is an introduced species. It grows in mats on the surface ...

'' has been described as the smallest, at in diameter.

References

Lemnoideae Plants described in 1980 {{Araceae-stub