Huperzia selago, the northern firmoss or fir clubmoss, is a vascular plant in the family Lycopodiaceae.

[3] It is a circumpolar plant, found in the northern parts of North America, Europe, and Asia.

[5] It is found in sandy pits, ditches, along lakeshores, heathland and in conifer swamps.

[1] In Europe, its range extends from Svalbard to the mountains of northern Spain and Italy, and from the British Isles east through central Asia to the Kamchatka peninsula, Japan, the Aleutian Islands, North America, Greenland and Iceland.

[3] This toxic plant, containing lycopodium alkaloid has been used as an emetic and a remedy against maggots in Finnish traditional medicine.