Published · Updated
Italian Stone Pine
How to Identify Italian Stone Pine
Italian stone pine is unmistakable once mature, the broad, flat-topped umbrella canopy is one of the most recognizable tree silhouettes in Mediterranean and California landscapes. Young trees look nothing like the mature form, which confuses many homeowners.
- Distinctive flat-topped, umbrella-shaped canopy on mature trees, looks like a giant mushroom or parasol
- Needles in bundles of 2, stiff, 4 to 7 inches long, slightly twisted, medium green
- Large, globe-shaped cones 4 to 6 inches, heavy, taking 3 years to mature; contain edible pine nuts
- Bark is thick, deeply furrowed into large reddish-brown plates, revealing orange-brown inner bark
- Young trees (under 20 years) are round and bushy, the umbrella shape doesn't develop until maturity
Where It Grows on the Peninsula
Italian stone pines were popular landscape trees from the 1960s through 1990s, planted in parks, commercial landscapes, and residential properties. They're common along El Camino Real corridors, in Stanford campus landscapes, and in mid-century residential developments throughout San Mateo, Burlingame, San Carlos, and Redwood City. Many were planted as "small accent trees" without understanding their eventual 60-foot spread.
Protection Status by City
| City | Status | Protected Size | Notes |
|---|---|---|---|
| Palo Alto | Protected | ≥15" DBH at 54" | Non-native tier (PAMC 8.10); listed natives 11.5", coast redwood 18" |
| San Mateo | Protected | ≥15" diameter (47.1" circumference) | Non-oak tier at 54"; many mature specimens exceed it |
| San Carlos | Protected | ≥11" diameter at 54" | Significant tree tier for any non-excluded species |
| Burlingame | Protected | ≥44" circumference (14" diameter) | Single all-species threshold at 54"; common in commercial and residential landscapes |
| Redwood City | Significant | ≥38" circumference | All species; measured at the widest point between 6" and 36" above ground; free permit |
| Menlo Park | Heritage tree | ≥15" diameter (47.1" circumference) | Any non-oak species at this size is a heritage tree |
Use our Permit Checker for your specific situation.
City permit guides · View map
Non-native species, falls under general tree protection ordinances
Common Issues & Diseases
Structural Overextension
The umbrella canopy is the Italian stone pine's signature, and its biggest liability. The broad, flat crown creates enormous wind-sail area and lateral loading on the trunk. As the canopy grows, branches extend further horizontally, increasing use. Heavy cone crops add weight. This combination makes mature Italian stone pines prone to catastrophic structural failure, especially in storms.
Heavy Cone Drop
Mature cones weigh 1 to 2 pounds each, and a healthy tree can produce hundreds annually. Cones falling from 60 feet create a genuine hazard for people, vehicles, and structures below. The cones are also rock-hard and can damage roofing, skylights, and gutters.
Pine Pitch Canker
Italian stone pine is susceptible to Fusarium circinatum, the same pitch canker that devastates Monterey pines, though generally less severely. Resinous cankers on branches cause dieback.
Root Heaving
Shallow, plate-like root systems heave sidewalks and driveways. The root flare on mature trees can extend 6 to 10 feet from the trunk, cracking any hardscape in its path.
Peninsula Care Calendar
Storm inspection critical, evaluate umbrella canopy for excessive sail area. Reduce end-weight on extended branches. Remove deadwood. Major structural pruning window.
New candle growth. Monitor for pitch canker symptoms. Healthy growth should be vigorous and uniform. Sparse or yellowing new growth indicates stress.
Cone development continues. No irrigation needed for established trees, they're Mediterranean and thrive on summer drought. Avoid pruning (beetle risk).
Mature cone drop season, be cautious underneath. Harvest pine nuts if desired (remove cones, dry, extract seeds). Schedule pre-storm arborist inspection.
Detailed Notes
Fire Risk
Moderate, pine needles and resinous wood are flammable but the open canopy structure is less dense than Monterey pine. Needle litter should be managed in fire zones.
Drought Tolerance
Excellent, Italian stone pine evolved in Mediterranean climates with hot, dry summers. Among the most drought-tolerant large trees available for Peninsula landscapes. No summer irrigation needed for established trees.
Wildlife Value
Moderate. Pine nuts are highly valued by squirrels, jays, and other birds. The distinctive canopy provides perching and nesting habitat for raptors. Less wildlife value overall than native oaks.
Arborist Pro Tips
Where to Find Italian Stone Pine on the Peninsula
City permit guides for areas where Italian stone pine is common:
Need Help With Your Italian Stone Pine?
An ISA Certified Arborist can assess your Italian stone pine's health, structure and permit status before any work.
Request a Consultation →
Written by Michael Schuck, ISA Certified Arborist WE-15750A · Updated February 2026
← Back to all species
Where Italian stone pine is protected: 56 Bay Area cities
35 of 56 jurisdictions regulate Italian stone pine on private property, each at its own size. The size is measured the way the city's code says (DBH or circumference, at the height shown). Rows come from the same rules the permit checker applies; the city page has the code section and the fee.
| City | Italian stone pine | Rule it falls under |
|---|---|---|
| Atherton | Exempt | Eucalyptus, acacia (Bailey, green wattle, black), tree of heaven, mimosa, Monterey pine |
| Belmont | Protected at 14″ DBH at 54″ | as "Any other species (large diameter tree)" |
| Belvedere | Exempt | Undesirable species (blue gum eucalyptus, Monterey pine, Monterey cypress, poplar, green wattle and blackwood acacia; coast redwood is listed too but the City gives redwoods special consideration) |
| Berkeley | Not a listed species | Only the listed species are regulated on private property |
| Burlingame | Protected at 44″ circumference at 54″ | as "Any species" |
| Campbell | Not a listed species | Only the listed species are regulated on private property |
| Contra Costa County (unincorporated) | Protected at 20″ circumference at 54″ | as "Listed native (oaks, bay, buckeye, madrone, sycamore, bigleaf maple, box elder, white alder, cottonwoods, willows, black walnut, juniper, tanoak, knobcone/gray pine, toyon, red elderberry, coast redwood) in a riparian, woodland or savanna area or a stand of 4+ trees"; adjacent to or part of a riparian, foothill woodland or oak savanna area, or part of a stand of four or more trees |
| Corte Madera | Exempt | Blue gum, sugar gum and manna gum eucalyptus, black acacia, green wattle acacia, Monterey pine, all junipers, Lombardy poplar |
| Cupertino | Not a listed species | Only the listed species are regulated on private property |
| Danville | Protected at 36″ DBH at 54″ | as "Any single-trunk tree 36" diameter or more (heritage)" |
| Dublin | Not a listed species | Only the listed species are regulated on private property |
| East Palo Alto | Protected at 8″ DBH at 54″ | as "Any species" |
| Fairfax | Protected at 38″ circumference at 54″ | as "Bishop pine, coast redwood, Douglas fir (heritage)" |
| Foster City | No private-tree permit | Street and park trees only |
| Fremont | Protected at 18″ DBH at 54″ | as "Any species" |
| Hayward | Not a listed species | Only the listed species are regulated on private property |
| Hillsborough | Protected at 18″ DBH at 54″ | as "Any species" |
| Lafayette | Not a listed species | Only the listed species are regulated on private property |
| Larkspur | Protected at 50″ circumference at 24″ | as "Any species (heritage tree)" |
| Los Altos | Protected at 12″ DBH at 48″ | as "Any species" |
| Los Altos Hills | Not a listed species | Only the listed species are regulated on private property |
| Los Gatos | Protected at 12″ DBH at 54″ | as "Any species, developed residential lot"; developed residential |
| Marin County (unincorporated) | Protected at 10″ DBH at 54″ | as "Other listed natives (bay, redwood, Douglas-fir, big-leaf maple, box elder, buckeye, bishop pine, alders, tanbark oak, nutmeg, chinquapin, Oregon ash, yew, hawthorn, mountain-mahogany, elderberry, service-berry, silk tassel, wax myrtle)" |
| Menlo Park | Protected at 47.1″ circumference at 54″ | as "Any other species" |
| Mill Valley | Not a listed species | Only the listed species are regulated on private property |
| Milpitas | Protected at 56″ circumference at 54″ | as "Any species, developed residential lot"; developed residential |
| Monte Sereno | Protected at 25″ circumference at 48″ | as "Any other species" |
| Moraga | Protected at 5″ DBH at 36″ | as "Native tree (oaks, bay, redwood, buckeye, madrone, big leaf maple, box elder, alders, willows, knobcone/Coulter/gray pine, sycamore, cottonwoods, black walnut, elderberry, Sargent cypress, ashes, toyon)" |
| Mountain View | Protected at 48″ circumference at 54″ | as "Any other species" |
| Novato | Protected at 24″ DBH at 24″ | as "Any species, native or non-native (heritage tree)" |
| Oakland | Exempt | Eucalyptus (any) and Monterey pine |
| Orinda | Not a listed species | Only the listed species are regulated on private property |
| Pacifica | Protected at 12″ DBH at 54″ | as "Heritage species (coast live oak, valley oak, California buckeye, Monterey pine, coast redwood)" |
| Palo Alto | Protected at 15″ DBH at 54″ | as "Any other non-invasive, non-high-water-use species" |
| Piedmont | No private-tree permit | Street and park trees only |
| Pleasant Hill | Protected at 18″ DBH at 54″ | as "Non-native tree (except eucalyptus and palms)" |
| Pleasanton | Protected at 55″ circumference at 54″ | as "Any other species" |
| Portola Valley | Exempt | Any species not on the native significant-tree list |
| Redwood City | Protected at 38″ circumference | as "Any species" |
| Ross | Protected at 12.01″ DBH at 54″ | as "Any species, single trunk over 12" DBH (improved parcel)" |
| San Anselmo | Exempt | Acacia, eucalyptus, plum, privet, Monterey pine, liquidambar (nuisance trees) |
| San Bruno | Protected at 6″ DBH at 54″ | as "Native bay, buckeye, oak, redwood or Monterey pine" |
| San Carlos | Exempt | Eucalyptus, Bailey/green/black acacia, tree of heaven, fruit trees, Monterey pine, palms |
| San Francisco | Protected at 12″ DBH at 54″ | as "Any species" |
| San Jose | Protected at 38″ circumference at 54″ | as "Any species" |
| San Mateo | Protected at 15″ DBH at 54″ | as "Any other species" |
| San Mateo County (unincorporated) | Exempt | Eucalyptus, pines, acacia, tanoak and bay laurel within 100 ft of a habitable structure or 30 ft of an evacuation road |
| San Rafael | No private-tree permit | Street and park trees only |
| Santa Clara | Protected at 38″ DBH at 54″ | as "Any other private tree" |
| Saratoga | Protected at 10″ DBH at 54″ | as "Any other species" |
| Sausalito | Exempt | Blue gum eucalyptus, Monterey pine, Monterey cypress, coast redwood, blackwood acacia, Bailey acacia, green wattle |
| South San Francisco | Protected at 48″ circumference at 54″ | as "Any other species" |
| Sunnyvale | Protected at 38″ circumference at 54″ | as "Any species" |
| Tiburon | Protected at 60″ circumference at 24″ | as "Any species (heritage size)" |
| Walnut Creek | Protected at 28″ circumference at 54″ | as "Any species" |
| Woodside | Protected at 36″ circumference at 48″ | as "Any other species" |
Street trees, city-designated heritage trees and trees required by a development approval are protected at any size in every city. Dead or hazardous trees still need the permit unless the city page says otherwise.