توضیحات
Schleichera oleosa is a plant in the soapberry family, Sapindaceae and occurs in the Indian Subcontinent and Southeast Asia
Schleichera oleosa, kusum tree, Ceylon oak, lac tree, 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. 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
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%
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.
بلوط سیلان ( کوسوم ) گیاهی روغنی از خانواده ناترکیان هم خانواده رامبوتان و لیچی است
این گیاه میوه های ترش مزه ای دارد که دانه ای روغنی درون آن است
میوه ها خوراکی هستند و از روغن دانه ها نیز استفاده میشود
در هند گیاه روغنی بلوط سیلان با گیاه روغنی گلرنگ (روغن کاشفه) هر دو یک اسم دارند (کوسوم) و ممکن است با هم اشتباه گرفته شوند گرچه از یک خانواده نیستند
