Bluebell is actually a Boston relative that follows the uniform growth of a 10" Boston but is symmetrical enough when young to use in a small pot. The fronds on Bluebell are a somewhat shorter than a Boston so that the growth habit tends more toward ball-shaped rather than adding length to the hanging fronds.

Bluebell is also a brighter green than a typical Boston, giving it a distinctive color to compliment it's mimicked shape.