Shimul tula (cotton).jpg

''Bombax ceiba'', like other trees of the genus ''Bombax'', is commonly known as cotton tree. More specifically, it is sometimes known as Malabar silk-cotton tree; red silk-cotton; red cotton tree; or ambiguously as silk-cotton or kapok, both of which may also refer to ''Ceiba pentandra''.

This Asian tropical tree has a straight tall trunk and its leaves are deciduous in winter. Red flowers with 5 petals appear in the spring before the new foliage. It produces a capsule which, when ripe, contains white fibres like cotton. Its trunk bears spikes to deter attacks by animals. Although its stout trunk suggests that it is useful for timber, its wood is too soft to be very useful.

Description

''Bombax ceiba'' grows to an average of 20 meters, with old trees up to 60 meters in wet tropical regions. The trunk and limb bear numerous conical spines particularly when young, but get eroded when older. The leaves are palmate with about 6 leaflets radiating from a central point (tip of petiole), an average of wide, in length. The leaf's long flexible petiole is up to long.

Cup-shaped flowers solitary or clustered, axillary or sub-terminal, fascicles at or near the ends of the branches, when the tree is bare of leaves, an average of wide, in width, petals up to in length, calyx is cup-shaped usually 3 lobed, an average of in diameter. Staminal tube is short, more than 60 in 5 bundles. stigma is light red, up to in length, ovary is pink, in length, with the skin of the ovary covered in white silky hair at 1mm long. Seeds are numerous, long, ovoid, black or gray in colour and packed in white cotton.

The fruit, which reaches an average of in length, is light-green in color in immature fruits, brown in mature fruits.

Gallery

File:Semal (Bombax ceiba) flower bud in Kolkata W IMG 4134.jpg, Flower bud
File:Bombax ceiba 003.JPG, Mid-shot of flowers
File:Semal (Bombax ceiba)- fallen flower at ground in Kolkata W IMG 4121.jpg, Single (fallen) flower
File:Bombax ceiba - Cotton tree - Shimul Flower (2).jpg, Blooms
File:Bombax ceiba - young tree bark.jpg, Young Bark
File:Bombax ceiba 17zz.jpg, Mature bark
File:HK CottonTreeSeed.JPG, Seeds
File:木棉 Bombax ceiba 20210320102058 01.jpg, Phyllotaxy
File:Bombax-ceiba-Hong-Kong-6.JPG, Fallen flowers in Hong Kong
File:Bombax ceiba Flower in Lantau island, Hong Kong.JPG, Up close of flower on the branch
File:Bombax Ceiba cotton pods.JPG, Opened cotton pods.
File:The trunk of Red Cotton Tree.jpg, The trunk of Red Cotton Tree

Cultivation

The tree is widely planted in southeastern Asian countries and regions (such as in Myanmar, Thailand, Vietnam, Malaysia, Philippines, Indonesia, southern China and Taiwan, etc.) According to Chinese historical record, the king of Nam Yuet (located in the southern China and northern Vietnam nowadays), Zhao Tuo, gave a tree to the emperor of the Han dynasty in the 2nd century BC.

This tree is commonly known as Let-pan (Burmese language: လက်ပံ), ''semal'' ( hi, सेमल), ''shimul'' ( bn, শিমুল) or ''ximolu'' ( Assamese: শিমলু) in India. It is widely planted in parks and on roadsides there because of its beautiful red flowers which bloom in March/April. This tree is quite common in New Delhi although it doesn't reach its full size of 60m there because of the semi arid climate. The cotton fibers of this tree can be seen floating in the wind around the time of early May. This tree shows two marked growth sprints in India: in spring and during the monsoon months. Perhaps due to subtropical climate and heavy rainfalls, it is found in dense populations throughout the Northeast India. In Myanmar, its flowers are let to be dry and cooked, which is one of the traditional foods of Myanmar.

This tree is also found in the eastern parts of Pakistan, especially in the eastern city of Lahore. The local Urdu

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