Horn Calcareous Moss (Mnium Hornum) is a perennial moss in the Mniaceae family with easy care difficulty. It requires moderate 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. It can be grown indoors.

Mnium hornum is a species of moss known for its dark, dull green color and fern-like, velvety leaves. It is commonly found on acidic substrates and has distinctive flower-like inflorescences at the tips of its shoots.