Photo: Diane Edwardson, April 3, 2013. Barley is just one of the many weeds on the Red Car Property and throughout the neighborhood, more commonly referred to as "foxtails' when they get stuck up your dog's nose, in their ears, eyes or between their toes. (Click on photo to enlarge.)
This is most likely Common Barley, a non-native species. Worth noting, that's a California Black Walnut tree in the background at the Corralitas entrance to the Red Car Property.