The stamps feature flowering medicinal plants which are native to Brunei. It is available in four designs, featuring the flowers of Tawar, Kantan, Kuduk-Kuduk and Simpur. The stamps are in the denomination of 20 cents, and 80 cents for a set.
Simpur is national flower of Brunei Darussalam.
The Simpur belongs to a genus of plants called Dillenia, a name derived from the personal name Dillenius, a German botanist (1684-1747). There are some 60 species of the Simpor in the world, which are distributed in the region extending from Madagascar in the west to Australasia in the east.
A freshly opened Simpur fruit
In Brunei Darussalam, eight species of Simpor are known, two of which, Dillenia beccariana (the River Simpor) and Dillenia suffruticosa (Simpor Bini), are more common. The Simpor species are usually trees, but some can be rather shrubby. The Simpor has yellow flowers, usually conspicuous and showy.