Quercus douglasii
E192064
Quercus douglasii, commonly known as blue oak, is a drought-tolerant deciduous oak tree native to California’s interior woodlands and foothills.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Quercus douglasii canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T1693676 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Quercus douglasii Context triple: [Sierra Nevada foothills, flora, Quercus douglasii]
-
A.
Ponderosa pine
Ponderosa pine is a large, long-lived coniferous tree native to western North America, known for its tall straight trunk, distinctive puzzle-like bark, and importance in montane forest ecosystems.
-
B.
Calocedrus
Calocedrus is a small genus of evergreen coniferous trees, commonly known as incense cedars, native to East Asia and western North America and valued for their aromatic wood and ornamental use.
-
C.
Mesquite
Mesquite is a suburban city in the eastern part of the Dallas–Fort Worth metropolitan area known for its residential communities and regional retail centers.
-
D.
Shasta red fir
Shasta red fir is a coniferous tree species native to the mountains of northern California and southern Oregon, known for its tall, straight trunk and dense, reddish-barked crown in high-elevation forests.
-
E.
Paliurus
Paliurus is a small genus of spiny shrubs and small trees known for their distinctive disc-shaped, winged fruits and occurrence in warm temperate to subtropical regions of Eurasia.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Quercus douglasii Target entity description: Quercus douglasii, commonly known as blue oak, is a drought-tolerant deciduous oak tree native to California’s interior woodlands and foothills.
-
A.
Ponderosa pine
Ponderosa pine is a large, long-lived coniferous tree native to western North America, known for its tall straight trunk, distinctive puzzle-like bark, and importance in montane forest ecosystems.
-
B.
Calocedrus
Calocedrus is a small genus of evergreen coniferous trees, commonly known as incense cedars, native to East Asia and western North America and valued for their aromatic wood and ornamental use.
-
C.
Mesquite
Mesquite is a suburban city in the eastern part of the Dallas–Fort Worth metropolitan area known for its residential communities and regional retail centers.
-
D.
Shasta red fir
Shasta red fir is a coniferous tree species native to the mountains of northern California and southern Oregon, known for its tall, straight trunk and dense, reddish-barked crown in high-elevation forests.
-
E.
Paliurus
Paliurus is a small genus of spiny shrubs and small trees known for their distinctive disc-shaped, winged fruits and occurrence in warm temperate to subtropical regions of Eurasia.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
deciduous tree
ⓘ
species of oak ⓘ vascular plant ⓘ |
| barkCharacteristic | checkered bark ⓘ |
| barkColor | light gray ⓘ |
| climatePreference | Mediterranean climate ⓘ |
| commonName | blue oak ⓘ |
| conservationStatus | not globally threatened ⓘ |
| distribution | endemic to California ⓘ |
| ecologicalRole |
dominant tree in blue oak woodlands
ⓘ
food source via acorns for birds and mammals ⓘ provides habitat for wildlife ⓘ |
| family |
Fagaceae
ⓘ
linked to:
oak family (Fagaceae)
|
| foundInEcoregion |
California oak woodland
ⓘ
Coast Ranges of California ⓘ
linked to:
Coastal Ranges
Sierra Nevada foothills ⓘ |
| fruitType | acorn ⓘ |
| genus | Quercus ⓘ |
| growthForm | medium-sized tree ⓘ |
| habitat |
dry slopes
ⓘ
foothill woodlands ⓘ savannas ⓘ |
| hasWoodType | hardwood ⓘ |
| kingdom | Plantae ⓘ |
| leafColor | bluish-green ⓘ |
| leafPhenology | loses leaves in summer drought in some sites ⓘ |
| leafShape | shallowly lobed leaves ⓘ |
| leafType | deciduous ⓘ |
| longevity | long-lived tree ⓘ |
| namedAfter | David Douglas ⓘ |
| nativeTo |
California
ⓘ
linked to:
California, United States
California foothills ⓘ California interior woodlands ⓘ |
| order | Fagales ⓘ |
| photosyntheticOrgan | leaves ⓘ |
| photosyntheticPathway | C3 ⓘ |
| plantType | tree ⓘ |
| pollination | wind-pollinated ⓘ |
| reproductiveStrategy | seed reproduction via acorns ⓘ |
| scientificName | Quercus douglasii ⓘ |
| soilPreference |
rocky soils
ⓘ
well-drained soils ⓘ |
| taxonRank | species ⓘ |
| tolerance | drought-tolerant ⓘ |
| typicalHeight | 6–20 meters ⓘ |
| usedFor |
erosion control
ⓘ
rangeland shade ⓘ wildlife habitat ⓘ |
| waterRequirement | low water requirement ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Quercus douglasii Description of subject: Quercus douglasii, commonly known as blue oak, is a drought-tolerant deciduous oak tree native to California’s interior woodlands and foothills.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.