Bombax is a genus of mainly tropical trees in the mallow family. They are native to western Africa, the Indian subcontinent, Southeast Asia, as well as sub-tropical regions of East Asia and northern Australia. Common names for the genus include silk cotton tree, simal, red cotton tree, kapok, and simply bombax. In Chinese they are known as Mumian (Chinese: 木棉; pinyin: mùmián), meaning "tree cotton". Currently four species are recognised, although many plants have been placed in the genus that were later moved.
The genus is best known for the species B. ceiba, which is widely cultivated throughout tropical and sub-tropical regions of the world. It is native to southern and eastern Asia and northern Australia.
The tree appears on the flag of Equatorial Guinea.
Bombax species are among the largest trees in their regions, reaching 30 to 40 metres in height and up to three metres trunk diameter. The leaves are compound with entire margins and deciduous, being shed in the dry-season. They measure 30 to 50 cm across and are palmate in shape with five to nine leaflets. The calyx is deciduous, meaning it does not persist on the fruits. They bear five to ten cm long red flowers between January and March while the tree is still leafless. The stamens are present in bundles in two whorls, while the staminal column lacks lobes. The ovary matures into a husk containing seeds covered by a fibre similar to that of the kapok (Ceiba pentandra) and to cotton, though with shorter fibres than cotton, that does not lend itself to spinning, making it unusable as a textile product.
- Bombax buonopozense P.Beauv.
- Bombax ceiba L.
- Bombax costatum Pellegr. & Vuill.
- Bombax insigne Wall.
- Bombax mossambicense A.Robyns
Formerly placed here
- Ceiba aesculifolia (Kunth) Britten & Baker (as B. aesculifolium Kunth)
- Ceiba pentandra (L.) Gaertn. (as B. pentandrum L.)
- Cochlospermum orinocense (Kunth) Steud. (as B. orinocense Kunth)
- Cochlospermum religiosum (L.) Alston (as B. gossypium L.)
- Cochlospermum vitifolium (Willd.) Spreng. (as B. vitifolium Willd.)
- Ochroma pyramidale (Cav. ex Lam.) Urb. (as B. pyramidale Cav. ex Lam.)
- Pachira aquatica Aubl. (as P. macrocarpum (Schltdl. & Cham.) K.Schum.)
- Pachira emarginata A.Rich. (as B. emarginata (A.Rich.) C.Wright)
- Pachira insignis (Sw.) Savigny (as B. affine (Mart. & Zucc.) Ducke)
- Pseudobombax ellipticum (Kunth) Dugand (as B. ellipticum Kunth)
- Pseudobombax grandiflorum (Cav.) A.Robyns (as B. cyathophorum (Casar.) K.Schum.)
- Pseudobombax septenatum (Jacq.) Dugand (as B. heptaphyllum L.)
Castle of the Devil
According to the folklore of Trinidad and Tobago, the Castle of the Devil is a huge silk cotton tree growing deep in the forest in which Bazil the demon of death was imprisoned by a carpenter. The carpenter tricked the devil into entering the tree in which he carved seven rooms, one above the other, into the trunk. Folklore claims that Bazil still resides in that tree.
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- "Genus: Bombax L.". Germplasm Resources Information Network. United States Department of Agriculture. 2007-10-05. Retrieved 2013-04-27.
- "GRIN Species Records of Bombax". Germplasm Resources Information Network. United States Department of Agriculture. Retrieved 2013-04-27.
- Beentje, Henk; Smith, Sara (2001), "Plant Systematics and Phytogeography for the Understanding of African Biodiversity", Systematics and Geography of Plants 71 (2): 284–286, doi:10.2307/3668673, ISSN 1374-7886, retrieved 2007-06-25
- (French) Robyns, André (March 31, 1963), "Essai de monographie du genre Bombax s.l. (Bombacaceae)", Bulletin du Jardin botanique de l'État a Bruxelles (Bulletin du Jardin botanique de l'État a Bruxelles, Vol. 33, No. 1) 33 (1): 1–144, doi:10.2307/3667210, JSTOR 3667210