Antidesma acidum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malpighiales
Family: Phyllanthaceae
Genus: Antidesma
Species:
A. acidum
Binomial name
Antidesma acidum
Synonyms[2]
  • Antidesma diandrum (Roxb.) B.Heyne ex Roth
  • Antidesma lanceolarium (Roxb.) Steud.
  • Antidesma parviflorum Ham. ex Pax & K.Hoffm.
  • Antidesma sylvestre Wall.
  • Antidesma wallichianum C.Presl
  • Stilago diandra Roxb.
  • Stilago lanceolaria Roxb.

Antidesma acidum is a shrub or small tree that is native to an area from Jawa to south-central China and Pakistan. It is a long-lived, shade-tolerant species that is usually found under closed-canopy. The fruit is eaten in many places, the leaves in some locations. In Luang Prabang (Laos) open-air markets, the leaves are only sold alongside Russula mushrooms, to give a sour flavour to soup made from the fungi.

Description

The species grows as a shrub or small tree, usually up to 6m tall, rarely up to 10m.[3] The young twigs have fine hairs. Obovate to elliptic-oblong papery leaves; upper surface smooth (though rarely surface is pilose), lower surface is pubescent (rarely smooth); dull colour, dries to a yellowish-green; acute to obtuse base (rarely attenuate); rounded to acute to acuminate apex (sometimes mucronate); size usually 5–10 cm, rarely down to 2 cm and up to 21 cm. Terminal to axillary inflorescences. Ellipsoid smooth drupes, 4-6 by 3-4mm, nearly terete to laterally compressed. Flowers in Zhōngguó/China from May to July, fruiting from June to November.

Distinguishing characteristics of this species are: the papery dull leaves and their size; domatia are present; the male flowers, at least, have a pubescent disc; usually 2 (rarely 1 or 3) stamens; an absent or small rudimentary ovary; size of the fruit; and female inflorescences and infructescences are usually 2–5 cm, rarely up to 9 cm.

In the southern part of the distribution range, pistillodes are always absent from the male flowers.

Branches and fruit
Buds and leaves
Underside of leaves
close-up of buds and leaves
Fruit

Wood anatomy

The wood of A. acidum is diffuse porous with occasional small vessels in solitary or radial multiple arrangements (up to 5 long).[4] The rays are heterocellular, with simple and scaliform perforations, scalariform ray-vessel pits, silica bodies are present in some cells. Septate fibres are present.

Distribution

The species is native to an area of tropical and subtropical Asia from Jawa, Indonesia to south-central Zhōngguó/China to Pakistan and the Western Himalaya region.[2] Countries and regions in which it grows are: Indonesia (Jawa); Thailand; Cambodia; Vietnam; Zhōngguó/China (Guizhou, Sichuan, Yunnan);[3] Laos, Myanmar; India (including Nicobar Islands, Andaman Islands, Assam); Eastern Himalaya; Bangladesh; Nepal; Western Himalaya; Pakistan.

Habitat and ecology

There are a number of forest types in Doi Inthanon National Park, Chiang Mai Province, northern Thailand.[5] This taxa grows in both dry dipterocarp forest (400-1000m elevation) and mixed deciduous forest (480-750m elevation) found there. The dry dipterocarp forest is dominated by Dipterocarpus tuberculatus, Quercus ramsbottomii, Shorea obtusa and Shorea siamensis. In the mixed deciduous forest, the predominant species are Lagerstroemia calyculata, Millettia leucantha, Pterocarpus macrocarpus and Tectona grandis.

In fire-influenced deciduous dipterocarp-oak forest in Thung Yai Naresuan Wildlife Sanctuary, western Thailand, the species is occasionally found under closed canopy.[6] There are fires through the region annually or semi-annually. In this region this species is deciduous.

In Southeast Asia generally, the shrub grows in secondary forests.[7]

The shrub/tree grows in open forests between 100 and 1500m altitude in Zhōngguó/China.[3] In the Himalayan foothills it grows up to an elevation of 600m.[8]

The plant in India is a host to the whitefly (Aleyrodidae), Dialeuronomada ixorae.[9]

Conservation

This plant has been assessed as of Least Concern for conservation by the IUCN.[1] This is because it has an extensive distribution, and is not currently or in the foreseeable future facing major threats. However the population is severely fragmented, there is a continuing decline in the number of mature individuals, and the habitat is continually declining in area, extent and quality due to direct and indirect human actions. Least Concern is a low level of concern, but it is still a level of concern.

Vernacular names

Uses

The people who live in the Phu Khiao Wildlife Sanctuary, Chaiyaphum Province, northeast Thailand, in their folkloric medicine to treat fever, drink a water decoction of the root of this species.[11]

Further north, in the Bueng Khong Long Non-hunting Area, Bueng Kan Province, northeastern Thailand, people harvest and eat the ripe wild fruits from March to September.[18]

In Cambodia, the fleshy fruit is eaten, and in local medicine an infusion of the root is given to young mothers as a tonic.[7]

The Bunong people of Mondulkiri Province, northeastern Cambodia, collect the wild fruits daily for food, and occasionally use the plant in their ethnomedicine to treat cough.[19]

When establishing Wurfbainia villosa, "medical cardamom", plantations in Phongsaly Province, northern Laos, in an area where shifting cultivation is dominant, farmers avoid new fallow areas that have sun-loving fast-growing plants, as these affect the cardamom plants.[20] In fallow that is over five years old these short-lived species are replaced by long-lived species such as A. acidum, Alstonia scholaris and Albizia chinensis, which provide shade for the cardamom.

At the open air markets of Luang Prabang, north Laos, the leaves of this species are only sold alongside Russula mushrooms.[12] They are regarded as a special herb to provide a sour element in the traditional soup made from the mushroom. The Russula mushrooms are usually sold as a mixture of species, including Russula alboareolata, Russula delica, Russula faustiana, Russula integra, Russula paludosa, Russula subfoetens, Russula virescens, and other species. The fruit are also sold, both sour (unripe) and sweet (ripe).

A variety of trees grow in rice fields in Champasak Province, southern Laos. Fruit trees, including this species, are common in fields.[13] This species provides fruit and medicine. The Boro of Assam relish the mild sour leaves of this plant and combine it with fish or meat to make curries. Amongst people who are known by the external designation of Loi in the Thoubal district of Manipur, northeast India, the plant is used in their traditional ethnomedicine to treat diabetes.[15]

In the Cooch Behar district of West Bengal, northeast India, the ripe fruit of the wild plant are eaten by children.[16]

The young tender leaves of the plant are gathered by "Tribal" and other rural people of Odisha, south India, to be eaten as vegetables, as are a large range of other wild plants.[21] They are fried if oil is available, otherwise boiled with salt, and then served as a side-item with rice.

The ripe fruit are eaten by the Tharu people living in Dudhwa National Park, Uttar Pradesh, northwest India (on the Nepal border).

The plant is cited as an agricultural species in Nepal.[17]

History

The species was named in 1788 by the Swiss chemist, botanist and entomologist Anders Jahan Retzius (1742-1821).[22] He influenced a number of scientists in both his family and students. The description of the taxa was published in his work Observationes Botanicae.[23]

References

  1. 1 2 Ye, J.F.; Botanic Gardens Conservation International (BGCI).; IUCN SSC Global Tree Specialist Group (2019). "Antidesma acidum". IUCN Red List of Threatened Species. 2019: e.T147640123A147640125. doi:10.2305/IUCN.UK.2019-2.RLTS.T147640123A147640125.en. Retrieved 19 November 2021.
  2. 1 2 "Antidesma acidum Retz". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 16 April 2021.
  3. 1 2 3 4 Li, Bingtao; Hoffmann, Petra. "FOC: Family List: FOC Vol. 11: Euphorbiaceae: Antidesma: 2. Antidesma acidum Retzius, Observ. Bot. 5: 30. 1789". Flora of China. eFloras.org. Retrieved 16 April 2021.
  4. ↑ Noshiro, Shuichi; Takahashi, Akira; Mouri, Chika; Suzuki, Mitsuo (1991). "Wood structure of Himalayan plants, IV" (PDF). Univ. Mus., Univ. Tokyo Bull. 34: 348–77. Retrieved 20 April 2021.
  5. ↑ SahunaluI, Pongsak; Teejuntuk, Sakhan; Sungpalee, Chettha; Methavararuk, Anusit (2001). Study on the vegetation zonation in Doi Inthanon National Park and its application to environmental education (PDF) (Report). Retrieved 18 April 2021.
  6. ↑ Webb, Edward L.; with four others (2013). "Composition, structure and spatial patterns of the tree community in a fire-influenced, deciduous dipterocarp-oak forest, western Thailand". Nat. Hist. Bull. Siam Soc. 59 (1): 15–37. Retrieved 18 April 2021.
  7. 1 2 3 Pauline Dy Phon (2000). Plants Utilised In Cambodia/Plantes utilisées au Cambodge. Phnom Penh: Imprimerie Olympic. p. 42.
  8. ↑ "Antidesma acidum Retz". Flora of Pakistan. Tropicos.org. Retrieved 17 April 2021.
  9. ↑ Evans, Gregory A. "Host Plant List Of The Whiteflies (Aleyrodidae) Of The World" (PDF). Retrieved 18 April 2021.
  10. ↑ Kaennakam, Sutin; Sichaem, Jirapast; Siripong, Pongpun; Tip-pyang, Santi (2013). "A New Cytotoxic Phenolic Derivative from the Roots of Antidesma acidum". Natural Product Communications. 8 (8): 1111–1113. doi:10.1177/1934578X1300800820. PMID 24079180. S2CID 7291462.
  11. 1 2 Chuakul, Wongsatit; Saralamp, Promjit (2000). "Medicinal Plants Used in Phu Khieo Wildlife Sanctuary Area, Chaiyaphum Province (Thailand". Acta Phytotax. Geobot. 51 (1): 67–98. Retrieved 18 April 2021.
  12. 1 2 Łuczaj, Łukasz; Lamxay, Vichith; with seven others (2021). "Wild food plants and fungi sold in the markets of Luang Prabang, Lao PDR". Journal of Ethnobiology and Ethnomedicine. 17 (6): 6. doi:10.1186/s13002-020-00423-y. PMC 7835671. PMID 33499871.
  13. 1 2 Natuhara, Y.; with four others (2011). "Uses of trees in paddy fields in Champasak Province, southern Lao PDR". Landscape Ecol Eng. 8: 115–122. doi:10.1007/s11355-011-0172-1. S2CID 1044724. Retrieved 20 April 2021.
  14. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 "Antidesma acidum Retz". Biodiversity India/India Biodiversity Portal. Retrieved 18 April 2021.
  15. 1 2 3 Khan, Mohd Habibullah; Yadava, P.S. (2010). "Antidiabetic plants used in Thoubal district of Manipur, Northeast India" (PDF). Indian Journal of Traditional Knowledge. 9 (3, July): 510–4. Retrieved 18 April 2021.
  16. 1 2 Bandyopadhyay, S.; Mukherjee, Sobhan Kr. (2009). "Wild edible plants of Koch Bihar district, West Bengal" (PDF). Natural Product Radiance. 8 (1): 64–72. Retrieved 18 April 2021.
  17. 1 2 3 Joshi, Bal Krishna; Adhikari, Ram C. "Economical Plant and Crop Species behind the Eyes of Researchers and Policy Makers". In Joshi, BK; Shrestha, R (eds.). Working Groups of Agricultural Plant Genetic Resources (APGRs) in Nepal. Nepal: Proc. National Workshop, 21–22 June 2018, Kathmandu. NAGRC. Retrieved 18 April 2021.
  18. ↑ Suksri, Siriwan; Premcharoen, Siraprapha; Thawatphan, Chitraporn; Sangthongprow, Suvit (2005). "Ethnobotany in Bung Khong Long Non-Hunting Area, Northeast Thailand". Kasetsart J. (Nat. Sci.). 39: 519–533. Retrieved 20 April 2021.
  19. ↑ Chassagne, François; Hul, Sovanmoly; Deharo, Eric; Bourdy, Geneviève (2016). "Natural remedies used by Bunong people in Mondulkiri province (NortheastCambodia) with special reference to the treatment of 11 most common ailments". Journal of Ethnopharmacology. 191: 41–70. doi:10.1016/j.jep.2016.06.003. PMID 27282662. Retrieved 18 April 2021.
  20. ↑ Ducourtieux, Olivier; Visonnavong, Phoui; Rossard, Julien (2006). "Introducing cash crops in shifting cultivation regions – the experience with cardamom in Laos". Agroforestry Systems. 66: 65–76. doi:10.1007/s10457-005-6645-1. S2CID 12827442. Retrieved 20 April 2021.
  21. ↑ Mallick, Samarendra Narayan; Sahoo, Tirthabrata; Naik, Soumendra Kumar; Panda, Pratap Chandra (2020). "Ethnobotanical study of wild edible food plants used by the Tribals and rural populations of Odisha, India for food and livelihood security" (PDF). Plant Archives. 20 (1): 661–669. Retrieved 20 April 2021.
  22. ↑ "Antidesma acidum Retz., Observ. Bot. (Retzius) v. 30 (1788)". International Plant Name Index (IPNI). Royal Botanic Gardens, Kew. Retrieved 17 April 2021.
  23. ↑ Retzius, Anders Jahan. "Observationes botanicae". Biodiversity Heritage Library. Retrieved 17 April 2021.
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