Bromeliad

The inflorescences produced by bromeliads are considerably more diverse than any other plant family. Some flower spikes may reach 10 meters tall, while others only measure 2–3 mm across. Upright stalks may be branched or simple with spikes retaining their color from two weeks up to 12 months, depending on species. In some species, the flower remains unseen, growing deep in the base of the plants. - Wikipedia