California’s Live Oaks in Focus

The new exhibit explores the hidden network that allows heritage coast live oak trees to communicate with one another.

2 minute read

April 4, 2024, 8:00 AM PDT

By Clement Lau


Two large California live oaks in a field of dry grass.

Gary Peplow / Allen Park

Focusing on Descanso Gardens’ heritage coast live oaks (Quercus agrifolia)Trees Talk explores the hidden network that allows trees to communicate with one another. Some centuries old, the oaks are magnificent giants that can grow up to 100 feet tall and are what remains of a forest that once blanketed the region. This exhibition showcases touchable and interactive elements, drawing on actual wood taken from oaks that tragically fell during a severe storm last year. Visitors can also examine acorn sprouts that show how roots develop as an oak tree grows. Trees Talk is open at the Sturt Haaga Gallery from March 16 to June 2.

The coast live oak is known as a “keystone species,” meaning that the tree supports the existence of hundreds of other species, including mammals, birds, insects, fungi, plants, reptiles, and amphibians. The Tongva people were the first people to live on the land where Descanso Gardens is today. They relied on coast live oak acorns as one of their most important plant foods due to its high nutritional value, abundance, and versatility. Acorns remain sacred to the Tongva community and are a staple in traditional meals. The importance of the coast live oak in the interconnected web of life cannot be overstated.

Los Angeles County is home to numerous public gardens, including the 150-acre Descanso Gardens which is one of four botanic gardens and arboreta in the county's park system.  Development at the Gardens is guided by a Master Plan that was adopted by the L.A. County Board of Supervisors in 2020.  The Master Plan seeks to implement the mission of the Gardens, which is "to practice exemplary stewardship of Descanso’s distinctive character and assets; offer people an experience close to nature; and cultivate understanding of the natural world and people’s place in it through inspiration, education and example." 

Monday, March 11, 2024 in Outlook Valley Sun

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Cover CM Credits, Earn Certificates, Push Your Career Forward

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

June 11, 2025 - Diana Ionescu

Metrorail train pulling into newly opened subterranean station in Washington, D.C. with crowd on platform taking photos.

Congressman Proposes Bill to Rename DC Metro “Trump Train”

The Make Autorail Great Again Act would withhold federal funding to the system until the Washington Metropolitan Area Transit Authority (WMATA), rebrands as the Washington Metropolitan Authority for Greater Access (WMAGA).

June 2, 2025 - The Hill

Large crowd on street in San Francisco, California during Oktoberfest festival.

The Simple Legislative Tool Transforming Vacant Downtowns

In California, Michigan and Georgia, an easy win is bringing dollars — and delight — back to city centers.

June 2, 2025 - Robbie Silver

Man in teal shirt opening door to white microtransit shuttle with cactus graphics and making inviting gesture toward the camera.

Albuquerque’s Microtransit: A Planner’s Answer to Food Access Gaps

New microtransit vans in Albuquerque aim to close food access gaps by linking low-income areas to grocery stores, cutting travel times by 30 percent and offering planners a scalable model for equity-focused transit.

1 hour ago - U.S. Department Of Transportation

Group of people at table set ouf with picnic food on street during a neighborhood block party.

This City Will Pay You to Meet Your Neighbors

A North Kansas City grant program offers up to $400 for residents to throw neighborhood block parties.

2 hours ago - The Kansas City Star

Crowd gathered with protest signs on April 5, 2025 on steps of Minnesota state capitol protesting Trump cuts to social security and other federal programs.

Commentary: Our Silence Will Not Protect Us

Keeping our heads down and our language inoffensive is not the right response to the times we’re in. Solidarity and courage is.

3 hours ago - Shelterforce Magazine