November 15, 2013 28 Days of Autumn: Day 25 ~ California Black Walnut ‘Juglans nigra’ — Windsor, CA Sonoma County Leave a comment 28 Days of Autumn Day 25 ~ California Black Walnut ‘Juglans nigra’ — Windsor, CA Sonoma County. Day 25 ~ California Black Walnut ‘Juglans nigra’ Share this:TwitterFacebookPinterestLike this:Like Loading... Related Posted by mace707 in Gardens & Flowers, Sonoma County Tagged: autumn, California Black Walnut, Fall, foliage, Juglans nigra, leaf peeping, Sonoma County, Windsor