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February 1, 2013 - 18 went

California Native Plant Society- plant ID Walk- Beeks Bight

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Added by Edward R.
on Feb 1, 2013.
 

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  • Edward R.

    Fresh Poison Oak leaves sprouting Poison oak (Toxicodendron diversilobum) & its eastern counterpart poison ivy (T. radicans) are two of the most notoriously painful plants in North America. Note: These species were formerly placed in the genus Rhus. Poison oak is a widespread deciduous shrub throughout the mountains and valleys of California. It thrives in shady canyons and riparian habitats. It commonly grows as a climbing vine with aerial (adventitious) roots that adhere to the trunks of oaks and sycamores. Rocky Mountain poison oak (Toxicodendron rydbergii) occurs in canyons throughout the western United States and Canada. Because the 2 species of western poison oak have the look of a vine as they develop, some other authors list poisen oak as a subspecies of eastern poison ivy. Poison oak often grows like a climbing vine. Poison oak and a related, look-alike shrub Rhus trilobata that also belongs to the sumac family (Anacardiaceae).

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