conyza canadensis

1 definition found

conyza canadensis - WordNet (r) 2.1 (2005) :

  Conyza canadensis
      n 1: common North American weed with linear leaves and small
           discoid heads of yellowish flowers; widely naturalized
           throughout temperate regions; sometimes placed in genus
           Erigeron [syn: horseweed, Canadian fleabane,
           fleabane, Conyza canadensis, Erigeron canadensis]