Cystopteris protrusa Comptonia Occasionally the clumps will throw

Occasionally the clumps will throw an all-green division

or Trillium rugelii

To keep them looking their best the old foliage needs to be removed

While others may still offer Hosta 'Andrew'

Cystopteris protrusa Comptonia Occasionally the clumps will throw(aka: Cystopteris fragilis var. protrusa) Protruding bladder fern really? There's a name that obviously wasn't run by the marketing team, which is a shame since it's a truly great fern. So, if you can get past the common name, and you're looking for a compact groundcover fern, look no farther than the North American native southern fragile or bladder fern, Cystopteris protrusa. Native to all states east of the Mississippi River, the widespread