And even in samples with three leaves, the variation between those leaves can be vast. “Based on the research, poison ivy had ...

The researchers used approximately 2,000 poison ivy photos submitted to iNaturalist.org to compare leaf shape variability across the United States. The research was published recently in the ...

Poison ivy (Toxicodendron radicans) is native to North America. Aside from having trivariate leaves, it is often identified by its serrated leaf margins and a lush green leaf color that can be either ...

The botanical name, Parthenocissus quinquefolia, means an ivy from Virginia that has five leaves. It's also known as American ivy because it's native to North America. Another name, woodbine ...