Narrow Filmy-fern (Hymenophyllum Rarum) is a perennial fern in the Hymenophyllaceae family with moderate care difficulty. It requires high watering and full shade or partial shade light in USDA hardiness zones 8-10. This plant is safe for cats and dogs. It can be grown indoors.

Hymenophyllum rarum is a thin-leaved filmy fern native to New Zealand and Tasmania, often found growing epiphytically on trees and rocks.