To San Francisco biologist Daniel Gluesenkamp, finding a rare species of manzanita on Doyle Drive — the site of a major Caltrans construction project in the Presidio — was like discovering an exotic orchid, or the tallest redwood tree. Manzanita itself is widely sanctified for its decorative and medicinal properties, and this particular species — Franciscan manzanita — had totemic power. It's the city's... More >>>