Blue Oak

Quercus douglasii Hook. & Arn.

2009 Keir Morse cc-by-nc-sa-3.0

Quercus douglasii (Blue Oak) is a species of tree in the family Fagaceae. They are native to The Contiguous United States, Western North America, and United States. They have yellow flowers. Individuals can grow to 60 feet.

URI: http://purl.obolibrary.org/obo/FLOPO_0900033
Definition: whole plant arborescent

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URI: http://www.wikidata.org/entity/Q578170

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URI: https://eol.org/schema/terms/western_north_america
Definition: From the Pacific to central North America. May include Saskatchewan, Texas, and/or Guanajuato

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URI: http://www.geonames.org/6252001

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URI: http://purl.obolibrary.org/obo/PATO_0000324
Definition: A color hue with medium wavelength of that portion of the visible spectrum lying between orange and green, evoked in the human observer by radiant energy with wavelengths of approximately 570 to 590 nanometers.
Attribution: [database_cross_reference: Dictionary:http://dictionary.reference.com/]

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EOL has data for 66 attributes, including:

anaerobic soil tolerance
- URI: http://eol.org/schema/terms/AnaerobicSoilTolerance
- Definition: The relative tolerance of the plant to anaerobic soil conditions.
- Attribution: USDA PLANTS database Characteristics Data Fields. http://plants.usda.gov/charinfo.html
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none
- URI: http://purl.bioontology.org/ontology/SNOMEDCT/260413007
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calcareous soil tolerance
- URI: http://eol.org/schema/terms/CalcareousSoilTolerance
- Definition: The relative tolerance of the plant to calcareous soil. Calcareous soil is defined as soil containing sufficient free CaCO3 and other carbonates to effervesce visibly or audibly when treated with cold 0.1M HCl. These soils usually contain from 10 to almost 1000g/kg CaCO3 equivalent.
- Attribution: USDA PLANTS database Characteristics Data Fields. http://plants.usda.gov/charinfo.html
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none
- URI: http://purl.bioontology.org/ontology/SNOMEDCT/260413007
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fire resistance
- URI: http://eol.org/schema/terms/FireResistance
- Definition: The ability of an organism to resist burning.
- Comment: If a plant can carry a fire—and most can—it is scored as "not fire resistant" in the USDA PLANTS database where this characteristic is evaluated with reference to problem fires in California. http://plants.usda.gov/charinfo.html
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no
- URI: http://eol.org/schema/terms/no
- Definition: This statement is false; the answer to this question is no.
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fire tolerance
- URI: http://eol.org/schema/terms/FireTolerance
- Definition: The relative ability of a plant to resprout, regrow, or reestablish from residual seed after a fire.
- Attribution: USDA PLANTS database Characteristics Data Fields (Fire tolerance). http://plants.usda.gov/charinfo.html
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low tolerance
- URI: http://purl.obolibrary.org/obo/PATO_0002394
- Definition: decreased tolerance to: A tolerance quality inhering in a bearer by virtue of the bearer's decreased ability to endure a stimulus.
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fruit or seed color
- URI: http://eol.org/schema/terms/FruitSeedColor
- Definition: The predominant and conspicuous color of the mature fruit or seed from a landscaping aesthetics standpoint.
- Attribution: USDA Plants database. Characteristics Data Fields. http://plants.usda.gov/charinfo.html
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brown
- URI: http://purl.obolibrary.org/obo/PATO_0000952
- Definition: A color consisting of dark orange, red, of very low intensity.
- Attribution: [database_cross_reference: Wikipedia:http://en.wikipedia.org/wiki/Brown]
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geographic distribution includes
- URI: http://eol.org/schema/terms/Present
- Definition: This organism is known to be present in this location or region. Not exclusive; other regions may also be reported.
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California
- URI: http://www.geonames.org/5332921
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native range includes
- URI: http://eol.org/schema/terms/NativeRange
- Definition: Lists jurisdictions in which a given organism is a member of the undisturbed fauna or flora.
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The Contiguous United States
- URI: http://www.wikidata.org/entity/Q578170
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planting density
- URI: http://eol.org/schema/terms/PlantingDensity
- Definition: Recommended minimum number of individual plants to plant per area.
- Attribution: USDA PLANTS database Characteristics Data Fields. http://plants.usda.gov/charinfo.html
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405 per acre
precipitation tolerance
- URI: http://eol.org/schema/terms/PrecipitationTolerance
- Definition: Minimum tolerable rainfall (in inches), expressed as the average annual minimum precipitation that occurs 20% of the time (i.e., the probability of it being this dry in any given year is 20%) at the driest climate station within the known geographical range of the plant. geographical range of the plant. For cultivars, the geographical range is defined as the area to which the cultivar is well adapted rather than marginally adapted.
- Comment: Minimum precipitation tolerance: Minimum tolerable rainfall, expressed as the average annual minimum precipitation that occurs 20% of the time (i.e., the probability of it being this dry in any given year is 20%) at the driest climate station within the known geographical range of the plant. Maximum precipitation tolerance: Maximum tolerable rainfall, expressed as the annual average precipitation of the wettest climate station within the known geographical range of the plant. For cultivars, the geographical range is defined as the area to which the cultivar is well adapted rather than marginally adapted.
- Attribution: USDA PLANTS database Characteristics Data Fields. http://plants.usda.gov/charinfo.html
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60 inch
seed spread rate
- URI: http://eol.org/schema/terms/SeedSpreadRate
- Definition: The capability of the plant to spread through its seed production compared to other species with the same growth habit.
- Attribution: USDA PLANTS database Characteristics Data Fields. http://plants.usda.gov/charinfo.html
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slow
- URI: http://purl.obolibrary.org/obo/PATO_0000911
- Definition: Decreased rate. A rate which is relatively low.
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seedling survival
- URI: http://eol.org/schema/terms/SeedlingSurvival
- Definition: The expected seedling survival percentage of the plant compared to other species with the same growth habit.
- Attribution: USDA PLANTS database Characteristics Data Fields. http://plants.usda.gov/charinfo.html
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low
- URI: http://ncicb.nci.nih.gov/xml/owl/EVS/Thesaurus.owl#C54722
- Definition: A minimum level or position or degree; less than normal in degree, intensity or amount.
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seeds per pound
- URI: http://eol.org/schema/terms/SeedPerPound
- Definition: The number of seeds per pound in an average seed lot.
- Attribution: USDA PLANTS database Characteristics Data Fields. http://plants.usda.gov/charinfo.html
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100

Known occurrences, collected specimens and observations of blue oak. View this species on GBIF

2009 Keir Morse cc-by-nc-sa-3.0