Least Adder's-tongue (Ophioglossum Lusitanicum) is a perennial fern in the Ophioglossaceae family with moderate care difficulty. It requires moderate watering and partial shade or filtered_light light in USDA hardiness zones 8-11. This plant is safe for cats and dogs. It can be grown indoors.

Ophioglossum lusitanicum is a small perennial fern in the family Ophioglossaceae, known as the least adder's-tongue.