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Taxon  Report  
Quercus ×morehus  Kellogg
Oracle oak
Quercus ×morehus is a tree that is native to California.
Siskiyou Del Norte Modoc Humboldt Shasta Lassen Trinity Plumas Tehama Butte Mendocino Glenn Sierra Yuba Lake Nevada Colusa Placer Sutter El Dorado Yolo Alpine Napa Sonoma Sacramento Mono Amador Solano Calaveras Tuolumne San Joaquin Marin Contra Costa Alameda Santa Cruz Mariposa Madera San Francisco San Mateo Merced Fresno Stanislaus Santa Clara Inyo San Benito Tulare Kings Monterey San Bernardino San Luis Obispo Kern Santa Barbara Ventura Los Angeles Riverside Orange San Diego Imperial
Genus: Quercus
Family: Fagaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Toxicity: Do not eat the fruit or leaf of this plant.
Name Status:

Alternate Names:
j06Quercus Xmoreha
CalfloraQuercus morehus
Information about  Quercus ×morehus from other sources
Nursery availability from CNPLX
Commercial availability unknown.
USDA PLANTS Profile (QUMO2)

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[wikipedia] Hybridity: Quercus morehus,[2] Abram's oak in Kellogg's original description[3] (later called oracle oak by Jepson[4]), is a named hybrid between the red oaks Quercus kelloggii (California black oak) and Quercus wislizeni (interior live oak).[5] Originally published as the unique species Quercus morehus by Kellogg,[3] rather than as the hybrid it is called today,[5] this tree is found in the US states of California and possibly southern Oregon,[6] usually where the territories of the purported parents overlap.[2] Because the name Q. morehus was adopted prior to 1980 while Q. wislizeni and Quercus parvula were still considered conspecific[7] it is often applied not only to trees appearing intermediate in form between Q. kelloggii and Q. wislizeni but also those that could be Q. kelloggii Q. parvula. Pending formal description the name Q. ?wootteni? (Wootten's oak) has been proposed for the California black oak (Q. kelloggii) Shreve oak (Q. parvula var. shrevei) hybrid.[8] Quercus morehus is a hybrid between a deciduous oak and an evergreen oak. Leaves are generally deciduous or partially deciduous and intermediate in form between Q. kelloggii and Q. wislizeni.[2] (contributed by Mary Ann Machi)


Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2023. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 12/04/2023).