Dendrolycopodium obscurum (Linnaeus) A. Haines. Common Groundpine, Flat-branched Tree-clubmoss. Phen: Jul-Sep. Hab: Acidic forests. Dist: NS and NB west to MI and WI, south to n. GA, ne. AL, s. IN, n. IL (?), and c. MN; China, Japan, Korea, e. Russia.

Origin/Endemic status: Native

Synonymy: = K3, K4, NE, NY, Tn, Va, Haines (2003a), Petlewski (2020), Petlewski et al (2022); = Lycopodium obscurum L. – FNA2, K1, Pa, Lin et al (2013); = Lycopodium obscurum L. var. obscurum – F, G, Md, RAB, W, WV; < Lycopodium obscurum L. – C, S13, Sf, Tat

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Wetland Indicator Status:

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

Heliophily: 3