Poison ivy in south-western part of Lincoln Woods State Park. Providence, Rhode Island, October 10, 2004
Red and yellow leaves of poison ivy in Delaware and Raritan Canal State Park near Carnegie Lake. Princeton, New Jersey, May 8, 2007
Flowers of false garlic (crow poison, Nothoscordum bivalve) in Lick Creek Park. College Station, Texas, March 27, 2008
Fall colors of poison ivy in Simmons Mill Pond Management Area south from Adamsville. Little Compton, Rhode Island, October 6, 2004
A sprout of poison ivy, in Delaware and Raritan Canal State Park, near Harrison Street crossing. Princeton, New Jersey, May 1, 2007
Flower of Death camas (Poison onion, Zigadenus nuttallii) along South Meyersville Road near FM 1155 S., north from Chappell Hill, Texas. April 7, 2010.
Multicolored sprout of poison ivy in Delaware and Raritan Canal State Park near Carnegie Lake. Princeton, New Jersey, May 8, 2007
Blooming false garlic (crow poison, Nothoscordum bivalve) in Lick Creek Park. College Station, Texas, March 27, 2008
Red and yellow sprout of poison ivy in Delaware and Raritan Canal State Park near Carnegie Lake. Princeton, New Jersey, May 8, 2007
False garlic (crow poison, Nothoscordum bivalve) on a lawn in TAMU Horticultural Gardens in Texas A and M University. College Station, Texas, February 25, 2009
Fall colors of poison ivy in south-western part of Lincoln Woods State Park. Providence, Rhode Island, October 10, 2004
A sprout of poison ivy on a tree, in Delaware and Raritan Canal State Park, near Harrison Street crossing. Princeton, New Jersey, May 2, 2007
Close up of flower of Death camas (Poison onion, Zigadenus nuttallii) along South Meyersville Road near FM 1155 S., north from Chappell Hill, Texas. April 7, 2010.
Young leaves of poison ivy over Delaware and Raritan Canal, near Carnegie Lake. Kingston, New Jersey, May 10, 2007
Young leaf of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 15, 2009
Fall colors of poison ivy in south-western part of Lincoln Woods State Park. Providence, Rhode Island, October 10, 2004
Leaves of poison ivy, in Delaware and Raritan Canal State Park, near Harrison Street crossing. Princeton, New Jersey, May 1, 2007
Emerging young leaves of poison ivy, in Delaware and Raritan Canal State Park, near Carnegie Lake. Princeton, New Jersey, May 2, 2007
Emerging poison ivy, in Delaware and Raritan Canal State Park, near Carnegie Lake. Kingston, New Jersey, May 4, 2007
Colored young leaves of poison ivy in Delaware and Raritan Canal State Park near Carnegie Lake. Princeton, New Jersey, May 8, 2007
Poison ivy in Delaware and Raritan Canal State Park, near Harrison Street crossing. Princeton, New Jersey, May 1, 2007
Early fall color of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 30, 2008
Shoot of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2009
Poison Ivy in Delaware and Raritan Canal State Park, near Carnegie Lake. Kingston, New Jersey, May 4, 2007
Colored offshoots of poison ivy in Delaware and Raritan Canal State Park near Carnegie Lake. Princeton, New Jersey, May 8, 2007
Poison ivy with budding flowers, in Delaware and Raritan Canal State Park, near Harrison Street crossing. Princeton, New Jersey, May 1, 2007
Dying poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 6, 2011
Poison ivy, in Delaware and Raritan Canal State Park, near Harrison Street crossing. Princeton, New Jersey, May 1, 2007
Offshoot of poison ivy, in Delaware and Raritan Canal State Park, near Harrison Street crossing. Princeton, New Jersey, May 1, 2007
Emerging leaves of poison ivy, in Delaware and Raritan Canal State Park, near Carnegie Lake. Princeton, New Jersey, May 2, 2007
Poison ivy with budding flowers, in Delaware and Raritan Canal State Park, near Carnegie Lake. Princeton, New Jersey, May 5, 2007
Poison ivy on a bark of a tree in Delaware and Raritan Canal State Park. Kingston, New Jersey, May 7, 2007
A flowering bush and poison ivy over Delaware and Raritan Canal, near Carnegie Lake. Kingston, New Jersey, May 10, 2007
Poison ivy in Sandcatcher park in Cape Cod. Sandwich, Massachusetts, May 18, 2003
Poison ivy in Delaware and Raritan Canal State Park, near Harrison Street crossing. Princeton, New Jersey, May 1, 2007
Berries of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 1, 2009
Poison ivy on bark of a tree, in Delaware and Raritan Canal State Park, near Harrison Street crossing. Princeton, New Jersey, May 1, 2007
Emerging poison ivy, in Delaware and Raritan Canal State Park, near Carnegie Lake. Princeton, New Jersey, May 2, 2007
Sprouting poison ivy, in Delaware and Raritan Canal State Park, near Washington Road bridge. Princeton, New Jersey, May 3, 2007
Sprouting poison ivy, in Delaware and Raritan Canal State Park, near Carnegie Lake. Princeton, New Jersey, May 5, 2007
Young leaf of poison ivy in Delaware and Raritan Canal State Park near Carnegie Lake. Princeton, New Jersey, May 8, 2007
Berries of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 3, 2008
Climbing poison ivy near Iron Bridge Trail in Lick Creek Park. College Station, Texas, November 27, 2008
Poison ivy bushes on dunes of Town Neck Beach in Cape Cod. Sandwich, Massachusetts, May 18, 2003
Young leaves of poison ivy, in Delaware and Raritan Canal State Park, near Carnegie Lake. Princeton, New Jersey, May 5, 2007
Blooming poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 1, 2010
Poison ivy with background of Delaware and Raritan Canal, near Harrison Street crossing. Princeton, New Jersey, May 1, 2007
Yellow foliage of poison ivy under power lines in Lake Bryan Park. Bryan, Texas, July 16, 2013
Red foliage of poison ivy near Lick Creek near Iron Bridge Trail in Lick Creek Park. College Station, Texas, November 27, 2008
Green berries of poison ivy on Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 16, 2009
Poison ivy in Sandcatcher park in Cape Cod. Sandwich, Massachusetts, May 18, 2003
Sprouting poison ivy on a tree, in Delaware and Raritan Canal State Park, near Carnegie Lake. Princeton, New Jersey, May 2, 2007
Greenbrier and poison ivy on trees in Ross Hills Park, 6 miles west from Lafayette, Indiana, September 25, 1999.
Poison ivy near Old Washington Town Site Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, March 22, 2009
Poison ivy shooting over Lake Carnegie, in Delaware and Raritan Canal State Park. Princeton, New Jersey, May 5, 2007
Fall colors of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, November 23, 2009
Young leaves of poison ivy in Lemontree Park. College Station, Texas, March 24, 2010.
Young leaves of poison ivy on a tree, in Delaware and Raritan Canal State Park, near Carnegie Lake. Princeton, New Jersey, May 2, 2007
Back lit leaf of poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 27, 2012
Poison ivy in Washington-on-the-Brazos State Historic Site. Washington, Texas, June 23, 2012
Yellow leaves of poison ivy in Lick Creek Park. College Station, Texas, July 7, 2012
