No Data Found
Cratoxylum formosum
Gerongang
Intermediate Sensitivity
| Species Name | Cratoxylum formosum |
|---|---|
| Common Name | Gerongang |
| Family | Hypericaceae |
| Genus | Cratoxylum |
| Taxonomic Synonyms/Past Names | |
| Taxonomic Notes |
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Species Information
1. Description
- Deciduous tree growing up to 45 m tall with an open crown and slender branches. Leaves 5-7 cm long, oval to elliptic-oblong, opposite. Flowers 1.5-2.5 cm long, white or pink, clustered along leafless twigs or behind young leaves. Ellipsoid to narrowly ovoid fruits 1.2-1.8 cm long, with a pointed tip.
2. Tree Size
Large (>15 m)
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Small (4-10 m) (0)
Medium (10-15 m) (0)
Large (>15 m) (1)
Unknown (0)
3. Full Distribution
- Andaman Islands, Southern Thailand, Cambodia, South Vietnam, south-eastern China, Peninsular Malaysia, Sumatra, Java, Banka, Borneo, Sulawesi and the Philippines
4. Habitat and Ecology
- Semi-open areas and secondary forests in lowlands
5. Altitude (in meters)
- Up to 1200 m
6. Landscape Type
Urban Streets, Blue-green Corridors, Small Urban Green Spaces
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Urban Streets (1)
Blue-green Corridors (1)
Small Urban Green Spaces (1)
Coastal Fronts (0)
Unknown (0)
7. IUCN Conservation Status
Least Concern
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Not Evaluated (0)
Data Deficient (0)
Least Concern (1)
Near Threatened (0)
Vulnerable (0)
Endangered (0)
Critically Endangered (0)
Extinct in the Wild (0)
Extinct (0)
Unknown (0)
8. Malaysian Red List from MyBIS
Least Concern
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Not Evaluated (0)
Not Applicable (0)
Data Deficient (0)
Least Concern (1)
Near Threatened (0)
Vulnerable (0)
Endangered (0)
Critically Endangered (0)
Regionally Extinct (0)
Extinct in the Wild (0)
Extinct (0)
Unknown (0)
9. Are more than 100 individuals available in local nurseries?
Yes
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Yes (1)
No (0)
Unknown (0)
10. How would you characterise the growth rate of this species?
Medium
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Fast (0)
Medium (1)
Slow (0)
Unknown (0)
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11. Does this species have an invasive root system?
No
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Yes (0)
No (1)
Unknown (0)
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12. Is this species damaging or does it have staining resin or sap?
No
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Yes (0)
No (1)
Unknown (0)
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13. Does this species produce large and/or staining fruits?
No
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Yes (0)
No (1)
Unknown (0)
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14. Does this species produce substances in its bark, leaves, fruits and/or seeds that are poisonous or harmful to humans?
No
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Yes (0)
No (1)
Unknown (0)
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15. Does this species have specific lighting requirements?
Full sun
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Full sun (1)
Partial sun & shade (0)
Full shade (0)
Partial shade (0)
Unknown (0)
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16. How would you characterise the air pollution tolerance of this species?
High
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Low (0)
Medium (0)
High (1)
Unknown (0)
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- Needs Explanation [1]
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17. How would you characterise the soil pollution tolerance of this species?
High
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Low (0)
Medium (0)
High (1)
Unknown (0)
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18. Does this species have specific soil ph requirements?
No
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Yes (0)
No (1)
Unknown (0)
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- pH 6.2-7.0 [1]
19. Does this species have specialised habitat requirements?
No
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Yes (0)
No (1)
Unknown (0)
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- Inferred from habitat association. [1]
20. Does this species occur/survive in habitats prone to saltwater intrusion?
Yes
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Yes (1)
No (0)
Unknown (0)
- It is a hardy species. It can be seen growing near the beach, but none were observed soaked in salt water for extended periods.
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21. Does this species occur/survive at locations that experience high temperatures?
Yes
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Yes (1)
No (0)
Unknown (0)
- Widely distributed in arid regions. Specimens planted in Cambodia lost their leaves, caught fire, and flowered during the peak of the dry season.
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22. Can this species tolerate inundation for >1 month?
No
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Yes (0)
No (1)
Unknown (0)
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23. Can this species tolerate water absence for >1 month?
Yes
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Yes (1)
No (0)
Unknown (0)
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24. Can this species tolerate storm conditions (e.g., strong winds)?
Yes
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Yes (1)
No (0)
Unknown (0)
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- It is highly tolerant of strong winds. [1]
25. Does this species have specific humidity requirements?
No
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Yes (0)
No (1)
Unknown (0)
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26. Is this species highly prone to predation, parasitism, and/or disease?
No
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Yes (0)
No (1)
Unknown (0)
- Highly resistant to pests and disease.
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27. Please provide any additional information for this species in the context of climate change resilience and/or vulnerability.
-
Insufficient Data
28. Does this species have biodiversity value (e.g., provides food or habitat, or increases landscape connectivity for urban fauna)?
Yes
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Yes (1)
No (0)
Unknown (0)
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- The flower nectar attracts wildlife. It is a larval food plant for butterflies. [1]
29. Does this species have cultural value or provide products that are of some use to humans?
Yes
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Yes (1)
No (0)
Unknown (0)
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- Provides food, has medicinal properties and is used for timber [1]
Contributors: anonymous
Last Updated: 2023-03-15
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