A UC Berkeley-led citizen science project has discovered at least four outbreaks of a new, potentially more aggressive form ...

Where I live, in Northern California, poison oak is a native plant that is impossible to avoid if you enjoy hiking, camping ...

There are many kinds of oak in our country, but there is one shrub in California, which is known ... a victim in a greater or less degree to this poison shrub—to avoid it, is impossible, for ...

Pacific poison oak and Atlantic poison oak. Pacific grows across the western United States, particularly California, where ...

But poison oak may have more than three leaves, and depending on the season, species and local environment, plants can vary. All parts of the plant, including roots, can cause an allergic reaction ...

From now through the end of December is the time of year to inspect your trees for Sudden Oak Death. The mold pathogen that causes Sudden Oak Death, phytophthora ramorum, is most active during wet ...

Poison oak, Toxicodendron diversilobum, is flaming red in the fall landscape. However, don’t gather them for any bouquets to decorate your table. All parts of the plant are poisonous ...

The two plants differ in color, growing habits, and the appearance of their berries. They also differ from poison oak, another rash-causing plant. Virginia creeper has five leaves, poison ivy has ...

Also, be aware that oils (the substance which causes the ill-effects) are still toxic even after the leaves have fallen off the plant, such as in the fall. The oils also can transfer from one surface ...