Poodle Dog Bush, or Turricula parryi, is currently (July 2011) growing abundantly in many parts of the San Gabriel Mountains. Its seeds can remain dormant in soil for long periods, with the plant springing up quickly when the soil is disturbed, e.g. after a wildfire. Poodle Dog Bush causes severe irritation if touched, similar to poison oak or stinging nettle. It can raise blisters lasting as long as two weeks.
San Gabriel Mountains, July 2011