Rorippa palustris (BRASSICACEAE) Yellow Marsh-cress

Weeds to Whack

Yellow Cress is an annual or biennial herb native to Europe, considered cosmopolitan, which means it is native to just about everywhere. Stems erect, rarely prostrate or decumbent, usually single from the base, simple or branched upward, 3-12 cm long, glabrous or sparingly to densely hirsute below, sparingly hirsute to glabrous above.

Photo: Robert Whyte

Flower Close-up

Like many cresses this could have been carried by humans. It was recorded as collected during the voyage of HMB Endeavour but this is suspect.
Photo: Robert Whyte