Poison oak is a relative to poison ivy that contains the same oils and is extremely common in California. There are two types of poison oak plants, Pacific poison oak and Atlantic poison oak.

For the fourth Los Angeles Times subscriber hike, we traveled through federal park land and Point Mugu State Park. Thanks to all the readers who attended!

Poison ivy, oak and sumac all can create itchy rashes from urushiol. What you need to know before the rash starts.

Oak trees appeared yellow with their thousands of canaries and goldfinches. And those coastal live oaks — how grand they were!

Just thinking about poison ivy can make you itch. Blistering rashes on your arms and ankles, oozing bumps between your fingers and eyelid-swelling exposures are all-too-familiar summer hazards.

If you've never received a rash from poison oak, ivy or sumac, the rash could last 21 days or longer. If you have had the rash previously, it will last one to 14 days.

If you've never received a rash from poison oak, ivy or sumac, the rash could last 21 days or longer. If you have had the rash previously, it will last one to 14 days.

If you've never received a rash from poison oak, ivy or sumac, the rash could last 21 days or longer. If you have had the rash previously, it will last one to 14 days.

If you've never received a rash from poison oak, ivy or sumac, the rash could last 21 days or longer. If you have had the rash previously, it will last one to 14 days.