Sub-species
subsp. subpumilum
Dwarf Maidenhair Fern
This dwarf fern is similar to the species only smaller with fronds up to 120 mm (4¾ in) long and grows to a height of 150 mm (6 in) tall by 300 mm (1 ft) wide. It forms a dense mound and is rare in its native habitat and normally grows along the west coast of North America.

Cultivar
'Japonicum'
This semi-deciduous fern is similar to the species and grows to 762 mm (30 in) tall. It produces golden-red the new arching fronds during spring that mature to green.  It grows in USDA zones 3-8 and prefers a soil with a pH range from 5.5 to 7.0