galls
Taxons that create galls are listed in their normal taxonomic locations, but I’ve also collected them here for easier browsing based on the host plant. Although some galls are restricted to certain plant species, in most cases here I’ve organized them by host plant genus since the gall species are often more easily distinguished than the plant species.
This page also includes lerps, which look similar to galls.
The most popular references for galls are
Ron Russo’s Field Guide to Plant Galls of California and Other Western States (2007) and
his Plant Galls of the Western States (2021).
An up-to-date internet resource for galls is gallformers.org.
A good online reference is Joyce Gross’s web pages for
oak calls and
non-oak galls.
The Bioblitz Club also has PDF brochures for
spring galls and
fall galls.
Nancy Asquith has tons of additional links on iNaturalist.
beech family
rose family
sunflower family
other hosts
55 observed taxons / 8 unobserved taxons / 21 keys
Chris’s observations: 176 (85 are research grade)
Locations:
- Edgewood Park & Natural Preserve: 21
- Murray Ranch SP: 14
- Mt. Diablo SP: 8
- Bear Creek Redwoods OSP: 7
- Coal Creek OSP: 7
- Ansel Adams Wilderness: 6
- Coyote Valley OSP: 5
- Sibley Volcanic RP: 5
- Sweeney Ridge National Recreation Area: 5
- Waterdog Lake & Open Space: 5
- Castle Rock SP: 4
- Coyote Hills RP: 4
- Fremont Older OSP: 4
- Henry Cowell Redwoods SP: 4
- Jacks Peak CP: 4
- Purisima Creek Redwoods OSP: 4
- Quicksilver CP: 4
- Santa Teresa CP: 4
- Skyline Ridge OSP: 4
- Alum Rock Park, San Jose: 3
- Desolation Wilderness: 3
- Ed Levin CP: 3
- Hidden Villa, Los Altos Hills: 3
- Mt. Madonna SP: 3
- Nisene Marks SP: 3
- Pescadero Creek CP: 3
- Pinnacles NP: 3
- San Pedro Valley CP: 3
- El Corte de Madera OSP: 2
- Grant CP: 2
- McNee Ranch / Montara Mountain SP: 2
- Monte Bello OSP: 2
- Portola Redwoods SP: 2
- San Bruno Mountain State & County Park: 2
- Sierra Azul OSP: 2
- Wunderlich CP: 2
- Calero CP
- El Sereno OSP
- Garin RP
- Golden Gate National Recreation Area
- Henry Cowell Redwoods SP - Fall Creek Unit
- Huckleberry Botanic RP
- Lake Chabot RP
- Lexington Reservoir CP
- Picchetti Ranch OSP
- Rancho Cañada del Oro OSP
- Reinhardt Redwood RP
- Sierra Vista OSP
- Stevens Creek CP
- Ulistac Natural Area, Santa Clara
Months:
- Jan.: 5
- Feb.: 7
- Mar.: 4
- Apr.: 8
- May: 14
- Jun.: 18
- Jul.: 19
- Aug.: 32
- Sep.: 26
- Oct.: 9
- Nov.: 32
- Dec.: 2
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