Thick Firmoss (Phlegmariurus Crassus) is a perennial fern in the Lycopodiaceae family with moderate care difficulty. It requires moderate watering and partial shade or filtered_light light in USDA hardiness zones 9-12. This plant is safe for cats and dogs. It can be grown indoors.

Phlegmariurus crassus is a lycophyte species native to Central and South America, characterized by dense foliage and stout stems.