General poisoning notes:

False ragweed (Iva xanthifolia) is a native herb found across southern Canada. The plant can cause dermatitis in sensitive humans after they come in contact with the leaves. Lactating cows that ingest the leaves produce bitter-tasting milk (Muenscher 1975, Mitchell and Rook 1979).

References:

Muenscher, W. C. 1975. Poisonous plants of the United States. Revised. Collier Books, New York, N.Y., USA. 277 pp.

Nomenclature:

Scientific Name: Iva xanthifolia Nutt.

Vernacular name(s): false ragweed

Scientific family name: Compositae

Vernacular family name: composite

Go to ITIS*^ca for more taxonomic information on: Iva xanthifolia

References:

Agriculture Quebec. 1975. Noms des maladies des plantes du Canada/ Names of plant diseases in Canada. , Quebec City, Que., Canada. 288 pp.

Alex, J. F., Cayouette, R., Mulligan, G. A. 1980. Common and botanical names of weeds in Canada/Noms populaire et scientifiques des plantes nuisibles du Canada. Revised. Agric. Can. Publ., Ottawa, Ont., Canada. 132 pp.

Bailey, L. H., Bailey, E. Z. 1976. Hortus third. Revised. MacMillan, New York, N.Y., USA. 1290 pp.

Scoggan, H. J. 1978, 1979. The flora of Canada. Nat. Mus. Nat. Sci. (Ottawa) Publ. Bot. 7(1)-7(4). 1711 pp.

Van Wijk, H. L. 1911. A dictionary of plant names. Martinus Nijhoff, The Hague, The Netherlands. 1444 pp.

Victorin, M. 1964. Flore Laurentienne. 2nd ed. Univ. Montreal, Montreal, Que., Canada. 952 pp.

Geographic Information

Alberta
British Columbia
Manitoba
New Brunswick
Nova Scotia
Ontario
Prince Edward Island
Quebec
Saskatchewan

References:

Bailey, L. H., Bailey, E. Z. 1976. Hortus third. Revised. MacMillan, New York, N.Y., USA. 1290 pp.

Boivin, B. 1966, 1967. Énumération des plantes du Canada. Provencheria 6. Nat. Can. (Que.) 93: 253-274; 371-437; 583-646; 989-1063. 94: 131-157; 471-528; 625-655.

Image or illustration

false ragweed:

Images: images.google.com

Toxic parts:

leaves

References:

Mitchell, J. C., Rook, A. 1979. Botanical dermatology. Greenglass Ltd, Vancouver, B.C., Canada. 787 pp.

Muenscher, W. C. 1975. Poisonous plants of the United States. Revised. Collier Books, New York, N.Y., USA. 277 pp.

Notes on Toxic plant chemicals:

Mitchell and Rook (1979) report that potentially allergenic sesquiterpene lactones have been isolated from some members of the genus Iva.

Toxic plant chemicals:

unknown chemical

References:

Mitchell, J. C., Rook, A. 1979. Botanical dermatology. Greenglass Ltd, Vancouver, B.C., Canada. 787 pp.

Animals/Human Poisoning:

Note: When an animal is listed without additional information, the literature (as of 1993) contained no detailed explanation.

Humans

General symptoms of poisoning:

erythema

References:

Muenscher, W. C. 1975. Poisonous plants of the United States. Revised. Collier Books, New York, N.Y., USA. 277 pp.