Albizia chinensis
(Chinese albizia)

Pictures

Picture	Title	Caption	Copyright
Title Habit Caption Albizia chinensis (Chinese albizia); habit. nr. Bavda, Karnataka India. May 2012. Copyright ©Dinesh Valke/via wikipedia - CC BY-SA 2.0	Habit	Albizia chinensis (Chinese albizia); habit. nr. Bavda, Karnataka India. May 2012.	©Dinesh Valke/via wikipedia - CC BY-SA 2.0
Title Habit Caption Albizia chinensis (Chinese albizia); habit, showing foliage. Brahmagiri Wildlife Sanctuary, Karnataka, India. February 2017. Copyright ©Dinesh Valke/via flickr - CC BY-SA 2.0	Habit	Albizia chinensis (Chinese albizia); habit, showing foliage. Brahmagiri Wildlife Sanctuary, Karnataka, India. February 2017.	©Dinesh Valke/via flickr - CC BY-SA 2.0
Title Habit Caption Albizia chinensis (Chinese albizia); habit, showing flowers and foliage. nr. Bavda, Karnataka India. May 2012. Copyright ©Dinesh Valke/via wikipedia - CC BY-SA 2.0	Habit	Albizia chinensis (Chinese albizia); habit, showing flowers and foliage. nr. Bavda, Karnataka India. May 2012.	©Dinesh Valke/via wikipedia - CC BY-SA 2.0
Title Flower Caption Albizia chinensis (Chinese albizia); flower. nr. Bavda, Karnataka India. May 2012. Copyright ©Dinesh Valke/via wikipedia - CC BY-SA 2.0	Flower	Albizia chinensis (Chinese albizia); flower. nr. Bavda, Karnataka India. May 2012.	©Dinesh Valke/via wikipedia - CC BY-SA 2.0
Title Morphology Caption Albizia chinensis (Chinese albizia) 1. habit. 2. leafy branch. 3. central flower. 4. marginal flower. 5. pod Copyright ©PROSEA Foundation	Morphology	Albizia chinensis (Chinese albizia) 1. habit. 2. leafy branch. 3. central flower. 4. marginal flower. 5. pod	©PROSEA Foundation

Identity

Preferred Scientific Name

• Albizia chinensis (Osbeck) Merr.

Preferred Common Name

• Chinese albizia

Other Scientific Names

• Acacia stipulacea Roxb.
• Acacia stipulata DC.
• Albizia marginata (Lam.) Merr.
• Albizia stipulata (DC.) Boivin
• Inga purpurascens Hassk.
• Mimosa chinensis Osbeck
• Mimosa marginata Lam.
• Mimosa stipulacea Roxb.
• Pithecellobium serronii Glaz.

International Common Names

• English: sau tree; sauce tree; silk tree; siris
• French: albizia de Chine

Local Common Names

• Australia: chocolate heart albizia
• Cambodia: ko: i
• China: ying shu
• India: amulkia; bikumbh; chakua; godhunchi; kali siris; kasir; koroi; motta vagai; nirusil; ohi; pottu vaga; saris; sau; silai vagai; siran; tarli
• Indonesia: jeungjng; sengghung; sengon
• Laos: kha:ng; kha:ng hu
• Madagascar: albizi; bonara vazaha
• Nepal: kalo siris; rato siris
• Philippines: hinagit; kantingen; unik
• Samoa: tamaligi; tamaligi uliuli; tamalini
• Thailand: kaang juang; kham hung cham; saan khan
• Vietnam: soos ng rawsn tafu chu mef

EPPO code

• ALBCH (Albizia chinensis)

Summary of Invasiveness

A. chinensis is a large, multipurpose tree up to 30 m tall and 1 m diameter. It has a very wide native distribution including India, China and Southeast Asia, and is cultivated in many other tropical countries. Due its fast growth and prolific seed production it can become an aggressive colonizer. Seeds retain their viability for up to five years, although they are prone to bruchid attack. It is a common weed in its native range in Indonesia, and has proved invasive where introduced in the Pacific, especially in Hawaii and Samoa, as well as in Mayotte in the Indian Ocean. As it is also present in many other countries, and other Albizia species are invasive, there is a high risk that A. chinensis could also become an invasive species elsewhere in the future.

Taxonomic Tree

• Domain: Eukaryota
•     Kingdom: Plantae
•         Phylum: Spermatophyta
•             Subphylum: Angiospermae
•                 Class: Dicotyledonae
•                     Order: Fabales
•                         Family: Fabaceae
•                             Subfamily: Mimosoideae
•                                 Genus: Albizia
•                                     Species: Albizia chinensis

Notes on Taxonomy and Nomenclature

A. chinensis is a mimosoid legume in the Ingeae tribe. A variety is described from India, A. chinensis var. smithiana (Roxb.) K.C. Sahni, S. Chawla & S.S.R. Bennet (Sahni et al., 1977), which is accepted in the Plant List (2013). Further molecular work on the taxonomy of A. chinensis has been undertaken and further clarification of the genetic relationships between closely related species is likely (Aparajita et al., 2008). 

Description

From ICRAF (2014) and PIER (2014):

A. chinensis trees are commonly 20 m tall, sometimes to 30 and exceptionally to 40 m or more, with trunk diameters up to 70 cm, though 140 cm diameter trees are reported. It is sometimes erect when in dense stands, but is generally multistemmed with a flat, spreading crown. The bark is dark grey, quite smooth and thin but densely hooped and lenticellate.

Trees are unarmed, deciduous or evergreen depending on site and climatic conditions. Branchlets are slightly angular in the distal parts, terete, puberulous to tomentose, glabrescent.

Leaves are bipinnate with 4-14(-20) pairs of pinnae and (10-)20-30(-45) pairs of leaflets per pinna, 10-25 cm long. Leaflets are puberulous to tomentose, asymmetrical with the midrib strongly eccentric near one of the margins, 6-10 mm long, 2-3 mm wide, apex sharply acute, base obtuse, oblique, midrib close to the upper margin, sparsely sericeous or glabrous on either side. There are elliptical, raised nectar glands on the rachis just below each pair of pinnae, 2-3 mm x 1-1.5 mm, though glands are sometimes absent, and stipules up to 1.5 cm long and 3 cm wide.

Flowers 8-12 mm long (central one larger), in heads 20-25 mm in diameter (excluding stamens). These are usually in wide terminal panicles, sometimes reduced to 3-4 peduncles clustered in the leaf axils. Glomerule composed of 10-20 flowers, flowers pentamerous and dimorphic; the central flower is male, the marginal flowers are bisexual. The calyx is tubular to narrowly funnel-shaped, 2.5-5 mm long, tomentose to hirsute, ending in small triangular teeth, with white funnel-shaped corolla, 6-10 mm long and numerous stamens up to 30 mm long.

The indehiscent pods are a glossy reddish or yellowish-brown, flat and thin, (6-)10-17(-20) cm long and 1.7-3.5 cm wide, often with slightly sinuate margins, each containing 8-12 seeds. Seeds are dark brown, ellipsoid, laterally flattened, 7-10 mm long and 4-6 in diameter, distinctly median (remote from sutures), with a small basal pleurogram about 1 mm in diameter. There are 50,000 seeds/kg.

Plant Type

Distribution

A. chinensis is native to a wide area including South Asia, East and South-East Asia (USDA-ARS, 2014). It is native to much of India, especially in the foothill of the Himalayas, Nepal and Bhutan, but also throughout South-East Asia including Indonesia, and in parts of China. It is also cultivate in many parts of its native range (USDA-ARS, 2014).

It has been introduced to a number of African countries, though is only reported from southern Brazil in South America and a few Caribbean islands and some Pacific islands (PIER, 2014).

As a tropical and frost-sensitive species, reports in GBIF (2014) for the Netherlands, Spain and Syria are questioned, though are not entirely implausible, especially in sheltered or protected situations.

Distribution Table

The distribution in this summary table is based on all the information available. When several references are cited, they may give conflicting information on the status. Further details may be available for individual references in the Distribution Table Details section which can be selected by going to Generate Report.

Risk of Introduction

An Australian/New Zealand Weed Risk Assessment adapted for Hawaii gave A. chinensis had a high risk score for invasiveness of 8 (PIER, 2014). 

Habitat

A. chinensis has been intentionally introduced internationally as a potentially useful tree for agroforestry, fodder and soil improvement. 

Information is lacking regarding local movement and dispersal. The large seeds and dry pods are not conducive to dispersal by animals, though livestock could possibly browse and ingest the seeds. They could also be spread by flood waters and along coast lines.

Habitat List

Biology and Ecology

Genetics

A. chinensis is reported to have a chromosome number of 2n = 26 (Majumdar et al., 2000).

Reproductive Biology

In its native range, flowering and fruit varies depending on the prevailing climate, though pods can remain on the tree for at least several months. In Southeast Asia, A. chinensis flowers between September and June, with fruits ripening between October and August. In northern India, flowering begins in March and April, with pods ripening from December to March. The tree is generally evergreen, or may be leafless for a short period such as in northern India during the winter (ICRAF, 2014).

Seed storage is orthodox and it the plant reproduces entirely by seed in nature, although in cultivation, vegetative propagation by stump plants and tissue culture has proved possible. There are 50, 000 seeds/kg(, and dormancy is broken by various pre-treatments when raised in nurseries.

Physiology and Phenology

A. chinensis is a nitrogen-fixing tree that regenerates rapidly when cut or otherwise damaged. It is only slightly tolerant of drought and frost. The tree is mostly propagated by seed. Dormancy can be broken by scarification or soaking seed in concentrated sulfuric acid for 10 minutes, followed by washing and soaking in water for 18 hours. After 6-8 weeks, the seedlings can be transplanted into the field (ICRAF, 2014).

Environmental Requirements

A. chinensis is a tree with a broad native range, including the humid tropics in Southeast Asia, to more sub-humid regions in South and East Asia, and regions with a cool winter in northern India and neighbouring Himalayan countries (USDA-ARS, 2014). The mean annual rainfall in its native range varies from 1000 mm to 5000 mm, though it is sensitive to dry periods lasting more than a few months, and is also sensitive to anything more than the lightest of frosts. It grows from seas level to altitudes of 2400 m, though it is possible that it occurs at higher elevations (Missouri Botanical Garden, 2014). 

A. chinensis prefers moist, well-drained sites and thrives on lateritic alluvial soil, but is also tolerant to of poor, saline and alkaline soils and will grow in sandy soils and mine spoils (ICRAF, 2014).

Climate

Latitude/Altitude Ranges

Air Temperature

Rainfall

Rainfall Regime

Soil Tolerances

Soil drainage

• free
• impeded

Soil reaction

• neutral

Soil texture

• light
• medium

Special soil tolerances

• infertile
• shallow

Natural enemies

Notes on Natural Enemies

No serious diseases have been reported on A. chinensis, though many trees were killed by a canker in northeast India in the 1940s, which reduced longevity there to about 20 years (ICRAF, 2014). Infestation by thrips is reported to prevent flower opening, and young pods can be damaged by beetles and larvae of various bruchid beetles (ICRAF, 2014). The rust Ravenelia sessilis is a known pathogen (Cannon, 2008) that can cause significant damage in young seedlings in tree nurseries (Khan et al., 1993). Cephalosporium sp. is also reported to cause stem necrosis (Khan and Misra, 2000).

Other pests recorded include Endoclita signifer, Eurema hecabe (Sharma, 2006), the stem rot Ganoderma lucidum and Oxyrachis tarandus. The fungus Fusarium oxysporum is also a serious pathogen, and the insects Xystrocera globosa and Indarbela quadrinotata bore into living trees.

Means of Movement and Dispersal

A. chinensis has been intentionally introduced internationally as a potentially useful tree for agroforestry, fodder and soil improvement. It is likely that it may be further introduced.

Information is lacking regarding local movement and dispersal. The large seeds and dry pods are not conducive to dispersal by animals, though livestock could possibly browse and ingest the seeds. They could also be spread by flood waters and along coast lines.

Pathway Causes

Pathway Vectors

Impact Summary

Environmental Impact

A. chinensis is recorded as invasive in Hawaii, Samoa and Mayotte, but there is little information available regarding details of the specific environmental impacts. However, impacts are likely to be similar to those of other invasive Albizia species, in crowding out native species and monopolizing resources.

Speith and Harrison (2012) reported that A. chinensis can form single species stands that shade out all competition, and can alter the structure and composition of native ecosystems, thereby potentially facilitating further invasion by other invasive species. A. chinensis ‘is fast-growing and can displace vegetation preferred by threatened native birds, such as the purple-capped fruit dove (Ptilinopus porphyraceus) and the Pacific imperial pigeon (Ducula pacifica). Young leaves contain saponin and may be toxic to animals’ (Speith and Harrison, 2012).

Risk and Impact Factors

• Invasive in its native range
• Proved invasive outside its native range
• Has a broad native range
• Highly adaptable to different environments
• Tolerates, or benefits from, cultivation, browsing pressure, mutilation, fire etc
• Pioneering in disturbed areas
• Long lived
• Fast growing
• Has high reproductive potential
• Has propagules that can remain viable for more than one year
• Reproduces asexually
• Has high genetic variability

• Ecosystem change/ habitat alteration
• Reduced native biodiversity

• Competition - monopolizing resources
• Competition - shading
• Rapid growth

• Highly likely to be transported internationally deliberately

Uses

A. chinensis wood is lightweight, soft and non-durable, with light to dark brown heartwood and white sapwood. The wood is, however, resistant to termite and other insects attack, and is use in making canoes (Santhakumaranand Rao, 1995), packing-cases, boxes, planking, small turnery articles, and for construction and light furniture, tea chests, veneers. Good quality paper can be produced from A. chinensis pulp with the addition of other long fibred pulp. The wood is a poor fuel. The density of stem and bark is reported by Sagwal and Gupta (1987).

A. chinensis leaves have potential as fodder, as leaves are readily eaten by goats (Ahn et al., 1989). The foliage contains 21-28% crude protein and the chemical content has been assessment (Liu et al., 2009). Where grown for fodder, trees are grown in hedges or in dense stands with spacings of 3 m x 1 m or less. The trees can be harvested for fodder twice a year during the growing season by cutting the stem back to 1 m, and they tolerate frequent pruning (ICRAF, 2014).

A  low quality gum is extracted from the bark, which has been mixed with other gums and used as an extender for sizing paper. The bark contains triterpenes which have spermicidal activity (Rawat et al., 1989). An extract of the wood has can act as a repellent to subterranean termites (ICRAF, 2014).

A. chinensis is widely used in agroforestry systems in Himchal Pradesh, India (Naresh Kumar et al., 2010) and elsewhere in northern India, including as a shade tree in tea (Camellia sinensis) plantations in north-eastern India (Barua and Sarma, 1982; Saini et al., 2003) and in pineapple agroforestry in Bangladesh (Khaleque and Gold, 1993); it is also intercropped in China (ICRAF, 2014). A. chinensis has also been evaluated for agronomy in Australia (Gutteridge, 1990). When grown in tea plantations in India as a shade tree in agroforestry systems, A. chinensis is planted at spacings of between 7 m and 15 m apart. Trees grown for shade are left to grow to 7 m tall and then cut back to 4 m (ICRAF, 2014).

A. chinensis is also planted for slope stabilization, as a fast growing tree legume, and has proved valuable for the reforestation and improvement of degraded land. It is also planted as an ornamental tree in parks, gardens and along roads.

Uses List

Animal feed, fodder, forage

• Fodder/animal feed
• Forage

Environmental

• Agroforestry
• Amenity
• Erosion control or dune stabilization
• Land reclamation
• Ornamental
• Revegetation
• Soil conservation
• Soil improvement

Human food and beverage

• Honey/honey flora

Materials

• Wood/timber

Wood Products

Boats

Containers

• Boxes
• Cases
• Crates

Furniture

Pulp

• Short-fibre pulp

Sawn or hewn building timbers

• Carpentry/joinery (exterior/interior)

Veneers

Wood extractives (including oil)

Woodware

• Cutlery
• Industrial and domestic woodware
• Turnery

Similarities to Other Species/Conditions

A. chinensis can be confused with the A. lebbek and A. julibrissin, two other commonly introduced and morphologically similar Albizia species. A. lebbek is the most widespread species and is especially common in tropical sub-humid and semi-arid climates, whereas A. julibrissin is more prevalent in sub-tropical climates. A. chinensis  is also similar to another invasive tree Falcataria moluccana, also called ‘albizia’ in some countries. F. moluccana can be differentiated by its lighter-coloured bark and its stamens, which are only 10-15 mm long, about half the length of those in A. chinensis. 

Prevention and Control

Due to the variable regulations around (de)registration of pesticides, your national list of registered pesticides or relevant authority should be consulted to determine which products are legally allowed for use in your country when considering chemical control. Pesticides should always be used in a lawful manner, consistent with the product's label.

In Samoa, a practice reportedly developed by local farmers is to cut A. chinensis and converted invaded bush fallow to 1 m height, plant various species of grass, and then manage the regrowth as a shrub legume/grass pasture, as it tolerates regular cutting (Lee, 2009).

No other methods of control have been identified, though it might be assumed that those that have proved effective for the related A. julibrissin could also be attempted for A. chinensis.

References

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Aparajita S, Senapati SK, Rout GR, 2008. Identification and genetic relationships among nine Albizzia species based on morphological and molecular markers. Plant Biosystems, 142(1):30-39

Ash AJ, 1990. The effect of supplementation with leaves from the leguminous trees Sesbania grandiflora, Albizia chinensis and Gliricidia sepium on the intake and digestibility of guinea grass hay by goats. Animal Feed Science and Technology, 28(3-4):225-232; 16 ref

Barua DN, Sarma PC, 1982. Effect of leaf-pose and shade on yield of cultivated tea. Indian Journal of Agricultural Sciences, 52(10):653-656

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Chadha YR, 1985. The Wealth of India. Raw materials. Vol. I: A. New Delhi, India: Publications & Information Directorate, CSIR, 513pp

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Faridah Hanum I, Maesen LJG van der, eds. , 1997. Plant resources of southeast Asia. No. 11. Auxillary plants. Leiden, Netherlands: Backhuys

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Jain VK, Mohan Lal, Daleep Ram, 2002. Physical and mechanical properties of Albizzia chinensis from Dehradun (Uttranchal). Journal of the Timber Development Association of India, 48(3/4):36-40

Khan SN, Misra BM, 2000. Some new diseases of Albizia species from India. Indian Forester, 126(12):1289-1291

Khan SN, Misra BM, Tivari RK, 1993. Ravenelia sessilis, a destructive rust on Albizia chinensis in nurseries. Indian Journal of Forestry, 16(1):94-95

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Liu Rui, Yu ShiShan, Pei YueHu, 2009. Chemical constituents from leaves of Albizia chinensis. China Journal of Chinese Materia Medica, 34(16):2063-2066. http://www.cjcmm.com.cn

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Sagwal SS, Gupta NK, 1987. A study on density of stem and bark percentage in natural forests of ohi Albizia chinensis (Osbeck) Merr. Indian Journal of Forestry, 10(2):153-154

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Saini BC, Misra KK, Peeyush Sharma, 2003. Role of shade trees on growth and yield of tea (Camellia sinensis (L.) Kuntze.) - a review. Advances in Horticulture and Forestry, 9:123-137

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Distribution References

CABI, Undated. CABI Compendium: Status inferred from regional distribution. Wallingford, UK: CABI

CABI, Undated a. CABI Compendium: Status as determined by CABI editor. Wallingford, UK: CABI

GBIF, 2014. Global Biodiversity Information Facility. http://www.gbif.org/species

Ghaly N S, Melek F R, Abdelwahed N A M, 2010. Flavonoids from Albizia chinensis of Egypt. Revista Latinoamericana de Química. 38 (3), 153-158.

Gutteridge R C, 1990. Agronomic evaluation of tree and shrub species in southeast Queensland. Tropical Grasslands. 24 (1), 29-34.

ILDIS, 2014. International Legume Database and Information Service., Reading, UK: School of Plant Sciences, University of Reading. http://www.ildis.org/

Missouri Botanical Garden, 2014. Tropicos database., St. Louis, Missouri, USA: Missouri Botanical Garden. http://www.tropicos.org/

PIER, 2014. Pacific Islands Ecosystems at Risk., Honolulu, USA: HEAR, University of Hawaii. http://www.hear.org/pier/index.html

Space JC, Flynn T, 2002. Report to the Government of Samoa on Invasive Plant Species of Environmental Concern., Honolulu, Hawaii, USA: USDA Forest Service, Pacific Southwest Research Station, Institute of Pacific Islands Forestry. 78 pp. http://www.hear.org/pier/pdf/samoa_report.pdf

USDA-ARS, 2014. Germplasm Resources Information Network (GRIN). Online Database. Beltsville, Maryland, USA: National Germplasm Resources Laboratory. https://npgsweb.ars-grin.gov/gringlobal/taxon/taxonomysimple.aspx

USDA-NRCS, 2014. The PLANTS Database. Greensboro, North Carolina, USA: National Plant Data Team. https://plants.sc.egov.usda.gov

Links to Websites

Principal Source

Draft datasheet under review

Contributors

28/02/14 updated by:

Nick Pasiecznik, consultant, France

Distribution Maps