This significant ecological role of the Simpor is something which should be given due appreciation. The Simpor Bini is an indicator of underground water source, and traditionally some wells were dug based on the presence of the Simpor Bini. Some species of the Simpor have a unique fruit, which splits open like a star to expose the seeds to the birds for effective dispersal. The inner bark of the Simpor is rather thick with radial lines and fairly loosely fibrous, such that it produces a hissing sound when cut, a unique feature associated with the Simpor.