^ 'Lycopodium annotinum L., Lycopode à rameaux annuels'.Ottawa: NRC Research Press, National Research Council of Canada. Flora of the Canadian Arctic Archipelago.

Louis, MO & Harvard University Herbaria, Cambridge, MA. New York and Oxford – via, Missouri Botanical Garden, St. Flora of North America North of Mexico (FNA). In Flora of North America Editorial Committee (ed.). 'Trends and concepts in fern classification'. 'A community-derived classification for extant lycophytes and ferns'. includes photos and European distribution map ^ Altervista Flora Italiana, Licopodio gineprino, Lycopodium annotinum L.Vol. 2 – via, Missouri Botanical Garden, St. State-level distribution map from the North American Plant Atlas (NAPA). Greensboro, North Carolina: National Plant Data Team. Botanical Society of Britain and Ireland. It is usually unbranched or sparingly branched, each branch containing a cone at the top. Spinulum annotinum is a common and widespread club-moss spreading by means of horizontal stems running along the surface of the ground. The genus Spinulum is accepted in the Pteridophyte Phylogeny Group classification of 2016 (PPG I), but not in other classifications, which submerge the genus in Lycopodium. Pierre & Miquelon, all 10 provinces and all 3 territories of Canada, Alaska, and mountains of the contiguous United States), as well as Asia ( China, Russia, Japan, Korea, Nepal, Assam), and most of Europe. Spinulum annotinum, synonym Lycopodium annotinum, known as interrupted club-moss, or stiff clubmoss, is a species of clubmoss native to forests of the colder parts of North America ( Greenland, St.

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