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Quercus engelmannii Greene
USDA Symbol: QUEN
USDA Native Status: Native to U.S.
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.
Plant CharacteristicsDuration: Perennial Habit: Tree Leaf Complexity: Simple Flower:
Fruit: Size Class:
Bloom InformationBloom Time: Mar , Apr , May
CA Native Distribution:
S.w. CA & Santa Catalina Island Native Habitat:
Dry fans and foothills away from the coast USDA Native Status: L48(N)
Growing ConditionsLight Requirement:
Sun Soil Moisture:
Dry Soil Description:
Dry, rocky soils. Conditions Comments:
Slow-growing. Will go deciduous
under drought stress.
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:
From the National Organizations Directory
According to the species list provided by Affiliate Organizations, this plant is either on display or available from the following:
Santa Barbara Botanic Garden
- Santa Barbara, CA
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Record Modified: 2008-08-27
Research By: TWC Staff