Rorippa vs Rorippa islandica

Rorippa and Rorippa islandica both are nouns.

Word	Noun	Adjective	Verb	Adverb
Rorippa	Yes	No	No	No
Rorippa islandica	Yes	No	No	No

Rorippa (noun)	Rorippa islandica (noun)
annual and perennial herbs of damp habitats; cosmopolitan except Antarctica	annual or biennial cress growing in damp places sometimes used in salads or as a potherb; troublesome weed in some localities