poison ivy
Toxicodendron radicans (Anacaridiaceae)
Weed ID Links
Roots: Reddish and branching
Photo from: http://res2.agr.ca/ecorc/poison/radicans_e.htm
Stems/Leaves: The leaves are large, and three parted. The central leaflet has a longer stalk. The leaves are around 4 inches long at full growth. (5)
Flowers: The flowers have five green petals that unite at the base. (3)
Fruits/Seeds: The fruits is an uncolored small berry (5)
Methods of Reproduction: Spreads by seed. (2)
Montana Infestation: Infests all of Montana. (4)
Environments of Infestations: It infests the south eastern part of the United States the most. (4)
Comments: This plant contains urushiol, this oil will cause allergic reactions to over half the United States population. (1)
Impacts: If you come in contact with this plant you will develop a rash and other symptoms. (1)
Native Range: This plant is all over the United States and the lower part of Canada. There are many different types but almost every part of the United
States is effected by at least one type of this plant. (5)
Methods of control: Some methods of control for poison ivy are herbicides such as Roundup. Poison Ivy can also be mowed on a regular basis, as a form of control.
If you pull poison ivy this will also rid the area. Mulching and covering the plant with a tarp are also used to control the plant. (3)
How to Prevent Spread: To prevent spread you can use goats, these eat the plant so they do not spread. Also, you can mow the plant. (2)
Links:
http://res2.agr.ca/ecorc/poison/radicans_e.htm
http://poisonivy.aesir.com/
http://www.outdoorplaces.com/Features/Hiking/poisonivy/
http://www.duluthtrading.com/a/shop/dproduct.asp?UID=2004050312052777&GE...
http://www.aad.org/pamphlets/PoisonIvy.html
http://www.conservation.state.mo.us/nathis/plantpage/flora/poivy/
http://www.griffin.peachnet.edu/ga/cobb/Horticulture/Factsheets/PoisonIvy/pivy.htm
http://www.umm.edu/ency/article/000027.htm
http://www.geo-outdoors.info/poison_ivy_oak_sumac.htm
http://www.teclabsinc.com/symptoms_oaknivy.html
Bibliography:
1). Mulligan, G.A.; Junkins, B.E. 1977. The biology of Canadian weeds. 23. Rhus radicans L. Can. J. Plant Sci. [online] available: http://res2.agr.ca/ecorc/poison/radicans_e.htm, 2003-06-23.
2). Dunphry, Jim, Poison Ivy. [online] available: http://poisonivy.aesir.com/ 2004.
3). Unknown, OutdoorPlaces.Com, [online] available: http://www.outdoorplaces.com/Features/Hiking/poisonivy/ 2001.
4). Unknown, University of Maryland Medicine, [online] available: http://www.umm.edu/ency/article/000027.htm 2002.
5). Burrill, Larry, et. al, Weeds of the west, Published by The Western Society of Weed Science, 1996.
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By: Robert Barnosky, 5/2004.