Rorippa barbareifolia

Rorippa barbareifolia, the hoary yellowcress,^[3] is a plant species reported from Manchuria, Inner Mongolia, Mongolia, Siberia, Alaska, Yukon and Saskatchewan. It grows in wet habitats (though not completely submerged). It can be found along forest borders, in ditches, on stream banks, etc.^[4][5]

Rorippa barbareifolia
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Brassicales
Family:	Brassicaceae
Genus:	Rorippa
Species:	R. barbareifolia
Binomial name
Rorippa barbareifolia (DC.) Kitag.
Synonyms[1][2]
Camelina barbareifolia DC. Nasturtium barbareifolium (DC.) B. Fedtsch. Radicula barbareifolia (DC.) W. Wight ex P.S. Smith Rorippa barbareaefolia (DC.) A.E. Porsild Rorippa hispida var. barbareifolia (DC.) Hultén Rorippa islandica var. barbareifolia (DC.) S.L. Welsh Tetrapoma barbareifolium (DC.) Turcz. ex Fisch. & C.A. Mey. Tetrapoma kruhsianum Fisch. & C.A. Mey. Tetrapoma pyriforme Seem.

Rorippa barbareifolia can easily be distinguished from other species in the genus by its multi-valved fruits. Rorippa barbareifolia fruits have 3-6 valves, usually 4, while other species generally have 2, rarely 3. The plants are annual herbs with yellow, 4-parted flowers.^[6][7][8][9]