Definition of arrow weed in English:

arrow weed

noun

  • 1Arrowhead (genus Sagittaria).

  • 2US an evergreen shrub native to southwestern United States and northern Mexico, Pluchea sericea (family Asteraceae), which grows in dense thickets and has greyish-green leaves, clusters of purple flowers, and stiff straight stems formerly used by North American Indians to make arrows; compare arrowwood.

Origin

Mid 19th century.