Did you know that the dahlia is the official flower of San Francisco? The city's Board of Supervisors declared it so on October 4, 1926. And here's something for the bonus round: Mayor Gavin Newsom has declared Saturday to be Dahlia Flower Day.
Does Alameda have an official flower? If it does, I can't find what it is. But I think it should have one. Maybe something that grows well here and loves our sandy soil, but isn't exactly ubiquitous. My vote would be for the Pacific Coast Iris (Iris douglasiana). Any other suggestions?