Quercus kelloggii

Common Names:

California Black Oal, Kellogg Oak

Phonetic Spelling:

KWER-kus keh-LOH-jee-eye

Description:

Quercus kelloggii is a deciduous tree that typically grows 15 to 25 meters (50 to 80 feet) tall, with a broad, rounded crown. In favorable conditions, it can grow up to 30 meters (100 feet) tall. The leaves are deeply lobed, glossy green on top, and paler underneath. They are 10 to 20 centimeters (4 to 8 inches) long and turn bright yellow to orange-red in the fall. The tree produces inconspicuous yellowish-green flowers in the spring. Male flowers are in drooping catkins, while female flowers are small and clustered in leaf axils. The fruits are acorns, which are 2 to 3 centimeters (0.8 to 1.2 inches) long, with a scaly cup that covers about one-third of the nut. Acorns mature in one season and are an important food source for wildlife.

Distribution/Location:

Native to the western United States, primarily found in California and extending into southern Oregon. It is common in the Sierra Nevada and coastal mountain ranges

Environmental Concerns:

Conservation efforts focus on preserving oak woodlands and mitigating habitat loss due to urban development, agriculture, and logging. Restoration projects often include planting young trees and managing existing stands.

Additional Notes:

California Black Oak is a keystone species in its ecosystem, providing habitat and food for numerous wildlife species, including birds, mammals, and insects. Its acorns are particularly important for wildlife such as deer, squirrels, and birds. Indigenous peoples also have traditionally used California Black Oak for food (acorns), medicine, and materials. The wood is used for fuel, furniture, and construction. The tree is also valued for its ornamental qualities in landscaping.