The crown jewel adored by florists and gardeners would have to be Heliconias.
Flower heads, correctly termed as bracts, range in colours from soft pink to vibrant yellows and reds. These may be produced in a pendulant habit or erect. The true flower is either tucked out of sight within the bract, or protrudes out as a feature.
Heliconias come in a range of height and growth habits. Some may only reach 50cm while others may reach 6m in tropical climates.