valley oak

Quercus lobata

Member of white oaks (section Quercus)
high-latitude oaks (subgenus Quercus)
oaks (genus Quercus)
beech family (family Fagaceae)
dicots (class Magnoliopsida)
other colors in flowering plants

---

• leaf:
• margins deeply lobed (sinuses > 50% to midrib), without spines
• sinuses typically wider than oregon oak (Quercus garryana).
• adaxially often ± shiny, dark green
• abaxially fine-tomentose, dull to pale green
• acorn cap 10–30 mm deep, often as wide as deep, all scales tubercled
• nut 30–50 mm, generally long-conic, distally acute to ± obtuse
• common

Toxicity of acorn, oak (Quercus spp.):
1 – Skin contact with these plants can cause symptoms ranging from redness, itching, and rash to painful blisters like skin burns.
3 – Ingestion of these plants is expected to cause nausea, vomiting, diarrhea and other symptoms that may cause illness but is not life-threatening.

---

Chris’s observations: 11 (6 are research grade)

Locations:

• Edgewood Park & Natural Preserve: 3
• Coyote Creek Trail
• Coyote Valley OSP
• Ed R. Levin CP
• Henry Coe SP
• Joseph D. Grant CP
• Mt. Diablo SP
• Santa Teresa CP
• Windy Hill OSP

Months:

• Nov.: 4
• Dec.: 2
• Jan.: 1
• Feb.: 0
• Mar.: 0
• Apr.: 2
• May: 1
• Jun.: 0
• Jul.: 1

For more details, use advanced search.

---

Taxon info: iNaturalist – Calflora – CalPhotos – Jepson eFlora – FNA

Bay Area species: iNaturalist – Calflora