The Silk Cotton Tree (Bombax ceiba), also known as the kapok, can grow to 25m in height. The bark is light coloured, often grey and often has conical spines. In big trees there are noticeable buttresses at the bottom of the trunk. Its wide, almost horizontal branches, though deciduous, keep their leaves for most of the year. The dramatic flowers, which appear when the tree is leafless, are cup-shaped, with fleshy red petals up to 12 cm long. It is the fruit which produces the fine silky cotton which gives it its name.