Photo: Diane Edwardson, June 30, 2011. Native Pacific Blackberries are starting to ripen near the Adelbert All-Weather Lounge on the Red Car Property. (Click on photo to enlarge.)
*UPDATE 8-3-11: A berry connoisseur neighbor says these are Boysenberries, not blackberries. There are 188 species of berries listed on Calflora, including several native and non-native species that look just like this plant. So the ID is not definite yet.