Garden yellowrocket
Barbarea vulgaris R. Br. [Brassicaceae (Cruciferae)]
Haruzakiyamagarashi/Seiyouyamagarashi (ハルザキヤマガラシ/セイヨウヤマガラシ, 春咲山芥子/西洋山芥子)
Lifeform: weedy biennial-perennial forb
Distribution: naitive to Europe (exotic to Japan)
Assigned as 100 of the worst invasive alien species in Japan
Habitat: roadsides, stream banks and hedges
Barbarea vulgaris in Hokkaido
[Left] at Zenibako Coast on May 29 2011. [Center/Right] at N25/W1, North Ward, Sapporo, on May 25 2011.
In Hokkaido University Campus
[Left/Center] at the backyard of the North Library of HU on May 21 2009. [Rgiht] close to Co-op North Restaurant on July 5 2011.