San Francisco has a varied array of sidewalk trees. One of my favorites is the Bottlebrush tree (Callistemon rigidus).
From the photos, you can certainly see why they named it as such. It's nice to re-explore the beauty of such a plant. I see them constantly around the city, and have admittedly become a bit immune to their striking blooms. I thought it a good time to become re-infected with their beauty. :)