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Toxicodendron radicans

Botanic Family

Anacardiaceae

Author

(Linaeus) Kuntze

Common Names

• Poison Ivy
• Mark Weed
• Poison Mercury
• Poison Oak
• Mercury
• Markry
• Cowitch
• Eastern Poison Ivy
• Eastern Poison Oak
• Alantic Poison Oak
• Sumach

Geographical Habitats

• New Brunswick
• Nova Scotia
• Ontario
• Quebec - Canada
• Alabama
• Arkansas
• Arizona
• Connecticut
• District of Colombia
• Delaware
• Florida
• Georgia
• Iowa
• Illinois
• Indiana
• Kansas
• Kentucky
• Louisiana
• Massachussetts
• Maryland
• Maine
• Michigan
• Minnesota
• Missouri
• Mississippi
• North Carolina
• Nebraska
• New Hampshire
• New Jersey
• New York
• Ohio
• Oklahoma
• Pennsylvania
• Rhode Island
• South Carolina
• South Dakota
• Tennessee
• Texas
• Utah
• Virginia
• Vermont
• Wisconsin
• West Virgina - U.S.A. to Guatemala
• Mexico
• Guizhou
• Hubei
• Hunan
• Sichuan
• Taiwan
• Yunnan-China
• Japan Nova Scotia to Florida
• west to British Colombia & Arizona
• Bermuda
• Bahamas

Natural Habitats

• Woodland
• fence rows
• pastures
• thickets

Flowering Times

• Mar Jun (Utah)

Fruiting Times

Deciduous erect shrub or creeping or climbing vine with poisonous sap, aerial roots. Trifoliate leaves glabrate above, glabrate or pubescent beneath, leaflets rarely toothed to 200mm long. 5mm greenish-white axillary dioical flowers in lax compound axillary racemes & 6mm wide cream to brown or greenish, sepals 1mm long, 5 petals. Glabrous drupe to 6mm diameter. slender branches, inflorescence lateral panicles flowers to 3mm long, 1mm across, fruit whitish, mostly glabrous

Further References

• Rehder 1934
• Bean 1950
• Menninger 1970
• Bailey 1976
• Krussmann 1976
• Huxley 1992 : Neotrop
• net
• Botanicus
• Bodkin
• FL
• The Plant List 2
• FOG
• Botanicus
• USDA
• FOSEUS
• FRM