Quercus engelmannii Greene
Engelmann oak, Engelmann's oak
Fagaceae (Beech Family)
USDA Symbol: QUEN
A small oak, 45-60 ft. tall , with a broad-spreading crown. The evergreen leaves are thick, gray-green, rounded and shallowly lobed. Tree with stout, spreading branches and broad, irregular crown, evergreen or nearly so. Branches are black and sinuous.
The species of this plant is named for George Engelmann (1809-1884) who was born in Germany and settled in St. Louis, Missouri, as a young man. He was a physician and botanist, describing especially North American Abies (Firs), Agaves, Cactus (for which he described more than 108 species), Cuscuta (Dodder), Euphorbiaceae (Spurge Family), Juncus (Rushes), Juniperus (“Cedar”), Pinus (Pines), Vitis (Grapes), and Yuccas. When he died much of his collection went to Missouri Botanical Garden.
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Plant CharacteristicsDuration: Perennial
Leaf Complexity: Simple
Size Class: 36-72 ft.
Bloom InformationBloom Time: Mar , Apr , May
Native Distribution: S.w. CA & Santa Catalina Island
Native Habitat: Dry fans and foothills away from the coast
Growing ConditionsLight Requirement: Sun
Soil Moisture: Dry
Soil Description: Dry, rocky soils.
Conditions Comments: Slow-growing. Will go deciduous under drought stress.
PropagationDescription: Oaks are most often propagated from seed. No pretreatment is necessary. Plant immediately – outdoors or in deep containers to accomodate long initial taproot. Many oaks require cold temperatures to initiate shoot development. Protect outdoor beds with
Seed Collection: Best quality acorns are picked or shaken from the tree. Collect when color has changed to brown. Best if sown immediately as acorns lose viability quickly in storage. Short-term storage in moist, shaded saw dust or sand. Acorns to be sown immediately can be soaked in hot water for 15 min. to prevent weevil infestation. Stored seed should be fumigated with methyl bromide.
Seed Treatment: Not Available
Commercially Avail: yes
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Santa Barbara Botanic Garden - Santa Barbara, CA
BibliographyBibref 841 - Native Alternatives to Invasive Plants (2006) Burrell, C. C.
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Additional resourcesUSDA: Find Quercus engelmannii in USDA Plants
FNA: Find Quercus engelmannii in the Flora of North America (if available)
Google: Search Google for Quercus engelmannii
MetadataRecord Modified: 2015-11-18
Research By: TWC Staff