bladder fern การใช้

• Many ferns only grow within specific pH ranges; for instance, the climbing fern ( " Lygodium palmatum " ) of eastern North America will only grow in moist, intensely acid soils, while the bulblet bladder fern ( " Cystopteris bulbifera " ), with an overlapping range, is only found on limestone.
• The shallow soils that have developed on ledges and crevices in the limestone and on the scree slopes support a vegetation in which ferns such as maidenhair spleenwort, " Asplenium trichomanes ", green spleenwort, " A . viride ", and brittle bladder fern, " Cystopteris fragilis ", are prominent.