Cellphone and nature? Yes! Map plants with app!

On fourth Thursdays, join a small group mapping invasives and some natives in Tilden Regional Park in the East Bay. Easy, leisurely walks -- learn about and enjoy nature while you contribute to a statewide database and stewardship, using CalFlora's cellphone-mapping apps! Info. RSVP, and instructions (let us know whether you have iphone or Android), f5creeks@gmail.com.