Gerald Alfred Mulligan

Gerald Alfred Mulligan (born Ottawa, Ontario, Canada, February 13, 1928), Canadian botanist.

Research Branch, Agriculture Canada (retired 1987, now emeritus Research Associate). Assistant Director, Biosytematics Research Institute 1973 to 1978. Director, Biosystematics Research Institute/Centre- 1978 to 1987.

IPNI standard form: G.A.Mulligan

Taxon names authored

(List may be incomplete)


(List may be incomplete)

Publications edit

(List may be incomplete)

1950s edit

  • Mulligan, G.A. 1952. Survey of common barberry (Berberis vulgaris L.) and European buckthorn (Rhamnus cathartica L.) in eastern Ontario. Canada Department of Agriculture Bull. 23 pp.
  • Mulligan, G.A. 1952. Barberry and buckthorn surveys in southern Ontario. Proc. sixth meeting National Weed Committee, pp. 130–131.
  • Mulligan, G.A. 1953. An example of hybridization in weeds. Proc. sixth meeting National Weed Committee, pp. 64–65.
  • Mulligan, G.A. 1954. The glabrous nodding thistle, Carduus nutans var. leiophyllus in Saskatchewan. Res. Rept National Weed Committee, Western Section, p. 108.
  • Mulligan, G.A. & Frankton, C. 1954. The plumeless thistles Carduus ssp. in Canada. Canadian Field-Naturalist 68: 31–36.
  • Lindsay, D.R. & Mulligan, G.A. 1955. Weed Survey in British Columbia. Res. Rept. National Weed Committee, Western Section, p. 125.
  • Moore, R.J. & Mulligan, G.A. 1956. Natural hybridization between Carduus nutans and Carduus acanthoides in Ontario. Canadian Journal of Botany 34: 71–85. DOI: 10.1139/b56-009
  • Mulligan, G.A. 1957. Chromosome numbers in Canadian weeds I. Canadian Journal of Botany 35: 779–789. DOI: 10.1139/b57-064
  • Mulligan, G.A. 1958. Chromosome numbers in the Chrysanthemum leucanthemum complex. Rhodora 60ː 122–125.
  • Moore, R.J. & Mulligan, G.A. 1958. Study of natural hybridization between Carduus acanthoides and Carduus nutans. Proceedings International Congress of Genetics 2ː 193.
  • Mulligan, G.A. 1959. Chromosome numbers in Canadian weeds II. Canadian Journal of Botany 37ː 81–92. DOI: 10.1139/b59-008
  • Mulligan, G.A. & Bassett, I.J. 1959. Achillea millefolium complex in Canada and portions of the United States. Canadian Journal of Botany 37ː 73–80. DOI: 10.1139/b59-007

1960s edit

1970s edit

1980s edit

  • Mulligan, G.A. 1980. Poison ivy, western poison oak, and poison sumac. Agriculture Canada Publ. 1699. 13pp.
  • Mulligan, G.A. 1980. The genus Cicuta in North America. Canadian Journal of Botany 58: 1755–1767.
  • Mulligan, G.A. & Munro, D.B. 1980. The biology of Canadian weeds 48. Cicuta maculata L., C. douglasii (DC.) Coult. & Rose}}, and C. virosa L. Canadian Journal of Plant Science 61(1): 93–105. DOI: 10.4141/cjps81-012
  • Alex, J.F., Cayouette, R. & Mulligan, G.A. 1980. Common and botanical names of weeds in Canada. [Noms populaires et scientifiques des plantes nuisibles du Canada.] Agriculture Canada Publ. 1765. 415 pp.
  • Mulligan, G.A. & Munro, D.B.. 1981. The biology of Canadian weeds 51. Prunus virginiana L., and P. serotina Ehrh. Canadian Journal of Plant Science 61(4): 977-992. DOI: 10.4141/cjps81-144
  • Cody, W.J. & Mulligan, G.A. 1982. Chromosome numbers of some Canadian ferns and fern allies. Le Naturaliste Canadien 109: 273–275.
  • Mulligan, G.A. & Munro, D.B. 1983. Vascular plants poisonous to livestock in Canada 1. A preliminary inventory. Agriculture Canada Technical Bulletin 1983-23E. 33pp.
  • Mulligan, G.A., Munro, D.B. & McNeill, J. 1983. The status of Stachys palustris (Labiatae) in North America. Canadian Journal of Botany 61: 679–682. DOI: 10.1139/b83-077
  • Mulligan, G.A. 1984. Chromosome numbers of some plants native and naturalized in Canada. Le Naturaliste Canadien 111: 447–449.
  • Mulligan, G.A. (Editor) 1984. The biology of Canadian weeds, contributions 33-61. Agriculture Canada Publ. 1765. 415 pp.
  • Mulligan, G.A. & Munro, D.B. 1984. Chromosome numbers and sexual compatibility in North American Rorippa sylvestris (Cruciferae). Canadian Journal of Botany 62: 575–580. DOI: 10.1139/b84-086
  • Mulligan, G.A. & Munro, D.B.. 1984. Wild and cultivated plants poisonous to humans in Canada. Agriculture Canada Technical Bulletin 1984E. 22 pp.
  • Mulligan, G.A. (Editor) 1986. Systematics in Agriculture Canada at Ottawa from 1886-1966. Historical Series No. 28E. 81 pp.
  • Mulligan, G.A. (Editor) 1986. La Recherche en systématique à Agriculture Canada Ottawa 1886-1966. Série historique No. 28F. 83 pp.
  • Mulligan, G.A. 1987. Common weeds of Canada. NC Press Ltd. Toronto. 143 pp.
  • Mulligan, G.A. 1987. Les plantes nuisibles communes du Canada. Marcel Broquet Inc., Montréal. 142 pp.
  • Mulligan, G.A. & Munro, D.B. 1987. The biology of Canadian weeds 77. Veratrum viride Ait. Canadian Journal of Plant Science 67(3): 777–786. DOI: 10.4141/cjps87-105
  • Frankton, C. & Mulligan, G.A. 1987. Weeds of Canada (revised edition). NC Press, Toronto. 217 pp.
  • Frankton, C. & Mulligan, G.A. 1988. Les plantes nuisibles du Canada (revisée). Marcel Broquet Inc., Montréal. 218 pp.
  • Mulligan, G.A. & Munro, D.B. 1989. Taxonomy of species of North American Stachys (Labiatae) found north of Mexico. Le Naturaliste Canadien 116(1): 35-51. Abstract Reference page

1990s edit

2000s edit

2010s edit

2020s edit

  • Mulligan, G.A. 2021. Draba (Brassicaceae) in Canada and Alaska. Harvard Papers in Botany Vol. 21, No. 1, pp. 189–199

References edit

  • Mulligan, Julie. 2014. The Real Weed Man: Portrait of Canadian Botanist Gerald A. Mulligan, 228 pp.
  • Al-Shehbaz, I.A. 2009. Two new North American species of Draba (Brassicaceae): D. heilii from New Mexico and D. mulliganii from Alaska. Harvard Pap. Bot. 14: 83–86. DOI: 10.3100/025.014.0112 Reference page
  • Butcher, Joan, 2020. Gerald A. (Gerry) Mulligan, A Long History and Career at the Farm. Friends of the Central Experimental Farm Newsletter, Fall 2020, pp.189-199.
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