Dendrolycopodium dendroideum (Michaux) A. Haines. Tree Groundpine, Round-branch Clubmoss, Prickly Tree-clubmoss. Phen: Jul-Sep. Hab: Openings, grassy balds, high elevation spruce-fir and northern hardwood forests. Dist: The northernmost of the L. obscurum complex, ranging from n. QC and NL (Newfoundland) west to AK, south to s. NJ, w. NC, MO, MN, SD, CO, MT, ID, and WA. Petrewski (2020) found that plants previously attributed to D. dendroideum in e. Asia are not part of this species.

Origin/Endemic status: Native

Synonymy: = Il, K3, K4, NE, NY, Tn, Va, Haines (2003a), Petlewski (2020), Petlewski et al (2022); = Lycopodium dendroideum Michx. – FNA2, GrPl, K1, Mo1, Pa, W; < Lycopodium obscurum L. – C, S13, Tat; < Lycopodium obscurum L. var. dendroideum (Michx.) D.C.Eaton – F, G, Md, RAB, WV

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FACU
• Eastern Mountains and Piedmont: FACU
• Great Plains: FAC
• Midwest: FAC
• Northcentral & Northeast: FACU

Heliophily: 5