Rhamnus cathartica
E89549
Rhamnus cathartica, commonly known as common buckthorn, is a deciduous shrub or small tree native to Europe and western Asia that is widely recognized as an invasive species in many parts of North America.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Rhamnus cathartica canonical | 5 |
| European buckthorn | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T682126 — 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: Rhamnus cathartica Context triple: [Rhamnaceae, hasMember, Rhamnus cathartica]
-
A.
Morus
Morus is a genus of deciduous trees commonly known as mulberries, valued for their sweet, edible fruits and use in silkworm cultivation.
-
B.
Celtis
Celtis is a genus of deciduous trees commonly known as hackberries, valued for their hardiness and small, berry-like fruits.
-
C.
Ulmus glabra
Ulmus glabra, commonly known as the wych elm or Scots elm, is a large deciduous tree native to Europe and western Asia, valued for its broad crown, rough leaves, and historical use in timber and landscaping.
-
D.
Ulmus minor
Ulmus minor is a species of elm tree native to Europe and western Asia, commonly known as the field elm and valued for its hard timber and ornamental use.
-
E.
Ulmus
Ulmus is a genus of deciduous trees commonly known as elms, widely distributed across the Northern Hemisphere and valued for their distinctive vase-shaped form and use in landscaping and timber.
- 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: Rhamnus cathartica Target entity description: Rhamnus cathartica, commonly known as common buckthorn, is a deciduous shrub or small tree native to Europe and western Asia that is widely recognized as an invasive species in many parts of North America.
-
A.
Morus
Morus is a genus of deciduous trees commonly known as mulberries, valued for their sweet, edible fruits and use in silkworm cultivation.
-
B.
Celtis
Celtis is a genus of deciduous trees commonly known as hackberries, valued for their hardiness and small, berry-like fruits.
-
C.
Ulmus glabra
Ulmus glabra, commonly known as the wych elm or Scots elm, is a large deciduous tree native to Europe and western Asia, valued for its broad crown, rough leaves, and historical use in timber and landscaping.
-
D.
Ulmus minor
Ulmus minor is a species of elm tree native to Europe and western Asia, commonly known as the field elm and valued for its hard timber and ornamental use.
-
E.
Ulmus
Ulmus is a genus of deciduous trees commonly known as elms, widely distributed across the Northern Hemisphere and valued for their distinctive vase-shaped form and use in landscaping and timber.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
deciduous shrub
ⓘ
plant species ⓘ small tree ⓘ |
| barkColor | dark gray to brown ⓘ |
| branchCharacteristic | often with thorny tips ⓘ |
| commonName |
Rhamnus cathartica
self-linksurface differs
ⓘ
surface form:
European buckthorn
common buckthorn ⓘ |
| deciduous | true ⓘ |
| ecologicalImpact |
alters soil chemistry
ⓘ
displaces native vegetation ⓘ forms dense thickets ⓘ reduces forest regeneration ⓘ |
| family | Rhamnaceae ⓘ |
| flowerColor | greenish-yellow ⓘ |
| flowerSex | dioecious ⓘ |
| fruitColor | black when ripe ⓘ |
| fruitType | drupe-like berry ⓘ |
| genus | Rhamnus ⓘ |
| growthForm |
multi-stemmed shrub
ⓘ
single-stemmed small tree ⓘ |
| habitat |
disturbed sites
ⓘ
forest edges ⓘ hedgerows ⓘ woodlands ⓘ |
| height | up to 6 meters ⓘ |
| introducedTo | North America ⓘ |
| invasiveIn |
Canada
ⓘ
North America ⓘ United States of America ⓘ
surface form:
United States
|
| kingdom | Plantae ⓘ |
| leafArrangement | subopposite leaves ⓘ |
| leafMargin | finely serrated ⓘ |
| leafPhenology |
leafs out early in spring
ⓘ
retains leaves late into fall ⓘ |
| leafType | simple leaves ⓘ |
| legalStatus |
prohibited invasive species in some U.S. states
ⓘ
regulated invasive species in parts of Canada ⓘ |
| management |
herbicide treatment
ⓘ
mechanical removal ⓘ |
| nativeTo |
Europe
ⓘ
western Asia ⓘ |
| order | Rosales ⓘ |
| seedDispersal | birds ⓘ |
| shadeTolerance | high ⓘ |
| soilPreference | wide range of soils ⓘ |
| taxonRank | species ⓘ |
| toxicity | fruits mildly toxic to humans ⓘ |
| use | historically used as a laxative ⓘ |
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: Rhamnus cathartica Description of subject: Rhamnus cathartica, commonly known as common buckthorn, is a deciduous shrub or small tree native to Europe and western Asia that is widely recognized as an invasive species in many parts of North America.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
European buckthorn