found: Work cat.: Zimmerman, Martin. Horseweed : scientific name, Conyza canadensis : common name, fleabane, 1963.
found: VegBank, accessed Feb. 9, 2006(Conyza Less., Common: horseweed, Status: accepted, Plant's Parent: Asteraceae)
found: Names in current use for extant plant genera, Electronic version 1.0, accessed Feb. 9, 2006(Conyza Less., Syn. Gen. Compos.: 203, Group: DICOTYLEDONES: COMPOSITAE)
found: Hortiplex, accessed Feb. 9, 2006(Conyza, horseweed, Family: Compositae)
found: NRCS Plants Database, accessed Feb. 9, 2006(Conyza Less., horseweed, Group: Dicot, Family: Asteraceae)