Schleichera

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Schleichera
Schleic oleos 080320-5971 rgn.JPG
Young leaves
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Sapindales
Family: Sapindaceae
Subfamily: Sapindoideae
Genus: Schleichera
Lour.
Species:
S. oleosa
Binomial name
Schleichera oleosa
(Lour.) Oken
Synonyms [2]

Schleichera trijugaWilld.

Bark Schleichera oleosa bark.jpg
Bark

Schleichera is a monotypic genus of plants in the soapberry family, Sapindaceae. There is only one species, Schleichera oleosa, a tree that occurs in the Indian Subcontinent and Southeast Asia. [3]

Contents

Species

Schleichera oleosa, kusum tree, Ceylon oak, [4] lac tree, [5] gum lac tree. It is a large deciduous (nearly evergreen) tree with a comparatively short fluted trunk and a shade spreading crown. It is frost and drought hardy and is subject to damage by grazing. It produces root-suckers freely, and it has good cropping power. The wood is very hard and reddish brown. [6] This tree is noted for its growth of new leaves that are bright red. In India the growth of these bright red leaves happens around March.

Young leaves blooming in various shades of red Kusumbha (Sanskrit- kusuNbh) (451989507).jpg
Young leaves blooming in various shades of red

The leaves are pinnate, with each leaf having 2-4 leaflets. The tree is host to Kusumi Lac (Kerria lacca), a lac insect which is native to India. Its seeds are the source of Kusum oil.

Flowers: The flowers are tiny and hardly noticeable, occurring in short dense yellow clusters.

Fruit: The fruit is 2.5 to 3 cm long - roughly the size of a small plum - and ovoid, 1-3 celled, and more or less abruptly tapering to a point, dry indehiscent.

Seed: The seed is 1.5 cm long, smooth, brown, and enclosed in a succulent aril which has an acidic taste, and contains 25-38% oil and up to 22% protein. It is irregular or ellipsoidal in shape, slightly compressed, and has a thick brown seed coat on its surface. The moisture in the dried seed should be maintained around 4-6%. [7]

Kernel: The kernel is 16-20% of the dried fruit and 60-64% of the seed. It is 51-52% oil. The kernel is susceptible to fungal attack.

Habitat

This tree grows naturally from the foothills of the Himalayas and the western Deccan Plateau, east to Sri Lanka and Southeast Asia. It grows in Bihar, Central and Southern parts of India. The tree occurs sporadically, seldom gregariously in dry, mixed deciduous forests. It grows in rocky, gravelly, or loamy, slightly acidic soil that is well drained. It is occasionally found in swampy locations, but it usually grows on rather dry soil, at low altitudes, but can be found at 900–1200 meters. [8] The requirement of normal rain fall is 750–2800 mm. and ambient temperature of 35-47.5 °C.

Names

In Thailand this tree is known as takhro (Thai : ตะคร้อ) or as kho (Thai : ค้อ), the latter being a name that it shares with Livistona speciosa , a kind of palm tree. [9] The German-Dutch botanist Georg Eberhard Rumphius, who lived for 45 years in Ambon, called this tree Cussambium. [10]

In India it is mostly known as Kusum (कुसुम) and was one of the main trees of undisturbed forests in Madhya Pradesh and the Deccan Plateau. [11] In Sri Lanka it is known as koan (කෝන්).

Synonyms

Pests

The tree is a host of the lac bug Kerria lacca , whose female secretes a resin known as shellac to form a tunnel-like tube as it traverses the branches of the tree. A variety of trees are able to host the insect, but the resin produced on the Schleichera tree is least colored.

Schleichera oleosa Govindoo.jpg
Flowers Schleichera oleosa 06.JPG
Flowers
Fruits Schleic oleos 080320-5967 rgn.JPG
Fruits
Seeds Kusum (Schleichera oleosa) seeds.jpg
Seeds

See also

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References

  1. Botanic Gardens Conservation International (BGCI).; IUCN SSC Global Tree Specialist Group (2019). "Schleichera oleosa". IUCN Red List of Threatened Species . 2019: e.T145823995A145823997. doi: 10.2305/IUCN.UK.2019-2.RLTS.T145823995A145823997.en . Retrieved 19 November 2021.
  2. 1 2 "Schleichera oleosa". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 21 December 2017.
  3. Kusum Tree
  4. Catalogue of Life
  5. USDA, NRCS (n.d.). "Schleichera oleosa". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 7 November 2015.
  6. "Ntfp-Mis". Iifm.ac.in. Retrieved 2013-11-21.
  7. SEA HandBook-2009, By The Solvent Extractors association of India
  8. "Schleichera oleosa (Lou.) Oken. : Seed Leaflet" (PDF). Curis.ku.dk. Retrieved 2013-11-21.
  9. เมล็ดค้อ Livistona speciosa
  10. Georg Eberhard Rumphius. Herbarium Amboinense. Cussambium. Liber I, Cap. 47, 1741
  11. "Schleichera oleosa - Kusum Tree". Flowersofindia.net. Retrieved 2013-11-21.
  12. "Schleichera oleosa (Lour.) Oken | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 2023-05-05.