If it is from a Tillandsia, it will develop a seed capsule that will split when it is ripe. The seeds have "parachutes" attached sort of like dandelion seeds, and are distributed by the wind. If the inflorescence is drying and you don't see signs of a capsule developing, it's possible (even likely) that the plant did not set seed.
If you know the specific name of the plant, that may prove to be very helpful.

Paul

You mean Tillandsia Pink Quill?
They make seed pods that split open and the seeds with feathery parachutes are produced. Flowers must be pollinated before seeds are produced.