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Name
Classifications and Characteristics
| Plant Division | Angiosperms (Flowering Seed Plants) (Dicotyledon) |
|---|---|
| Plant Growth Form | Tree (Big (>30m)) |
| Lifespan (in Singapore) | Perennial |
| Mode of Nutrition | Autotrophic |
| Plant Shape | Irregular |
| Maximum Height | 36 m |
Biogeography
| Native Distribution | Cambodia, Laos, Vietnam, Sumatra, Peninsular Malaysia, and Singapore |
|---|---|
| Native Habitat | Terrestrial (Primary Rainforest, Freshwater Swamp Forest) |
| Preferred Climate Zone | Tropical |
| Local Conservation Status | Native to Singapore (Critically Endangered (CR)) |
Description and Ethnobotany
| Growth Form | It is a tree up to 36 m tall, with spreading branches, and short buttresses. |
|---|---|
| Foliage | Its alternate, stalked leaves have leathery leaf blades that are oblong or drop-shaped-oblong, 8–42 by 5–20 cm, and have 10–18 pairs of lateral veins on each side of the midribs. |
| Flowers | Its flowering clusters are branched up to 3 times, and 4.5–22 mm long. Each cluster bears 6–15 stalked flowers that are sweetly-scented and 18–27 mm long. |
| Fruit | Its fruits are strongly grooved, egg-shaped or oval, and 27–37 by 18–22 mm. Each fruit contains 1 or 2 seeds surrounded in white, translucent fruit pulp. |
| Habitat | It grows in lowland forests up to 200 m altitude. |
| Associated Fauna | Its flowers are insect-pollinated. |
| Cultivation | It can be propagated by seed. |
| Etymology | Latin Alangium, after the Malabar plant name, alangi; Latin ridleyi, commemorating Henry Nicholas Ridley (1855–1956) |
| Ethnobotanical Uses | Cultural / Religious: Heritage Trees : There is currently one individual of Alangium ridleyi listed as a Heritage Tree in Singapore. It can be found at Singapore Botanic Gardens. To find out more about these trees, please visit the Heritage Tree Register. |
Landscaping Features
| Landscaping | It may be suitable for parks. |
|---|---|
| Desirable Plant Features | Ornamental Foliage, Fragrant (Flowers) |
| Landscape Uses | Parks & Gardens |
Fauna, Pollination and Dispersal
| Pollination Method(s) | Biotic (Fauna) |
|---|---|
| Seed or Spore Dispersal | Biotic (Fauna) |
Plant Care and Propagation
| Light Preference | Full Sun |
|---|---|
| Water Preference | Moderate Water |
| Plant Growth Rate | Moderate |
| Rootzone Tolerance | Moist Soils, Well-Drained Soils, Fertile Loamy Soils |
| Propagation Method | Seed |
Foliar
| Foliage Retention | Evergreen |
|---|---|
| Mature Foliage Colour(s) | Green |
| Mature Foliage Texture(s) | Leathery |
| Foliar Type | Simple / Unifoliate |
| Foliar Arrangement Along Stem | Alternate |
| Foliar Attachment to Stem | Petiolate |
| Foliar Shape(s) | Non-Palm Foliage (Obovate, Oblong) |
| Foliar Venation | Pinnate / Net |
| Foliar Margin | Entire |
| Leaf Area Index (LAI) for Green Plot Ratio | 3.0 (Tree - Intermediate Canopy) |
Floral (Angiosperm)
| Flower & Plant Sexuality | Bisexual Flowers |
| Flower Grouping | Cluster / Inflorescence |
|---|---|
| Flower Location | Axillary |
Fruit, Seed and Spore
| Fruit Classification | Simple Fruit |
|---|---|
| Fruit Type | Fleshy Fruit |
Image Repository
Others
| Master ID | 1408 |
|---|---|
| Species ID | 2701 |
| Flora Disclaimer | The information in this website has been compiled from reliable sources, such as reference works on medicinal plants. It is not a substitute for medical advice or treatment and NParks does not purport to provide any medical advice. Readers should always consult his/her physician before using or consuming a plant for medicinal purposes. |
