The City of Los Angeles loves to designate historic-cultural monuments, from pallets stacked in an eccentric guy's backyard in Van Nuys (since thrown away) to actual significant buildings. Even street trees: here are the historically designated median or parkway trees that the city's urban forestry division tracks:

* Monument #148 – Coral (Erythrina caffra) trees on San Vicente Boulevard between Bringham Avenue and 26th Street
* Monument #465 – Sycamore (Platanus racemosa) trees on Bienvenida Avenue between Sunset Boulevard and dead end south of Sunset Boulevard
* Monument #93 – California Pepper (Schinus molle) trees on Canoga Avenue between Ventura Boulevard and Saltillo Street
* Monument #49 – Olive (Olea europea) trees on Lassen Street between Topanga Canyon Boulevard and Farralone Avenue
* Monument #24 – Coast Live Oak (Quercus agrifolia) (deceased) in median island on Louise Avenue 210' south of Ventura Boulevard
* Monument #41 – Deodar Cedar (Cedrus deodar) trees on White Oak Avenue between Devonshire Street and Ronald Reagan Freeway (118)
* Monument #94 – Median island Queen Palm (Syagrus romanzoffianum) and Mexican Fan Palm (Washingtonia robusta) trees on Highland Avenue
* Monument #509 – Camphor (Cinnamomum camphora) trees in the 1200 block of Lakme Avenue
* Monument #67 – Deodar Cedar (Cedrus deodar) trees on Los Feliz Boulevard between Riverside Drive and Western Avenue.

Number 24, by the way, is long gone. The blogger who calls himself Floyd Bariscale visits the city's designated landmarks for his indispensable Big Orange Landmarks. He ran the photo of Chatsworth's Lassen Street olives in 2007.