Catherine's Moss (Atrichum Undulatum) is a perennial moss in the Polytrichaceae family with easy care difficulty. It requires high watering and partial shade or full shade or dappled_shade light in USDA hardiness zones 3-8. This plant is safe for cats and dogs.

Atrichum undulatum is a species of moss in the family Polytrichaceae, known for its dark green to yellowish coloration and forming extensive patches in moist woodland and streamside habitats.