Common weeds of Canada : field guide /

by Mulligan, Gerald A., 1928-, Mulligan, Gerald A., 1928-, Mulligan, Gerald A., 1928-
Published 1987

Poisonous plants of Canada /

by Mulligan, Gerald A., 1928-, Mulligan, Gerald A., 1928-
Published 1990

Poisonous plants of Canada /

by Mulligan, Gerald A., 1928-
Published 1990

Vascular plants poisonous to livestock in Canada /

by Mulligan, Gerald A., 1928-
Published 1983

Natural interspecific hybridization between sexual and apogamous species of the beech fern genus Phegopteris Fée

by Mulligan, Gerald A., 1928-

Poison-ivy, western poison oak, poison sumac /

by Mulligan, Gerald A., 1928-
Published 1980

Key to the Brassicaceae (Cruciferae) of Canada and Alaska /

by Mulligan, Gerald A., 1928-
Published 2000

Flora of the Queen Charlotte Islands

by Calder, James A., 1915-, Mulligan, Gerald A., 1928-, Mulligan, Gerald A., 1928-, Taylor, Roy L., Taylor, Roy L.
Published 1968

Common and botanical names of weeds in Canada = Noms populaires et scientifiques des plantes nuisibles du Canada /

by Alex, J. F, Alex, J. F, Cayouette, Richard, Mulligan, Gerald A., 1928-
Published 1980

Weeds of Canada

by Frankton, Clarence, Frankton, Clarence
Published 1970

Weeds of Canada /

by Frankton, Clarence, Frankton, Clarence
Published 1987

The Biology of Canadian weeds /

Published 1979

Weeds of Canada /

by Frankton, Clarence
Published 1987

Weeds of Canada

by Frankton, Clarence
Published 1970

Common and botanical names of weeds in Canada = Noms populaires et scientifiques des plantes nuisibles du Canada

Published 1992

Flora of the Queen Charlotte Islands

by Calder, James Alexander, 1915-
Published 1968