Botrychium angustisegmentum (Pease & A.H. Moore) Fernald. Lanceleaf Moonwort, Narrow Triangle Moonwort. Phen: Jul-Aug. Hab: Forests and grassy balds. Dist: B. angustisegmentum ranges from NL (Newfoundland) and ON south to VA, WV, NC, OH, MI, and MN, and in the Rocky Mountains of Canada and MT

Origin/Endemic status: Native

Other Comments: B. lanceolatum, into which B. angustisegmentum has sometimes been lumped or treated as only infraspecifically distinct, is widespread in w. North America. The two taxa are genetically distinct (Farrar & Wendel 1996) and are here accorded species rank.

Synonymy ⓘ: = K4, NE, NY, Williams, Farrar, & Henson (2016); = Botrychium lanceolatum (S.G.Gmel.) Ångstr. ssp. angustisegmentum (Pease & A.H.Moore) R.T.Clausen – FNA2, Pa; = Botrychium lanceolatum (S.G.Gmel.) Ångstr. var. angustisegmentum Pease & A.H.Moore – C, F, G, K1, K3, Va, W, WV; = n/a – RAB; < Botrychium lanceolatum (S.G.Gmel.) Ångstr. – Lin et al (2013)

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FAC (name change)
• Eastern Mountains and Piedmont: FACW (name change)
• Great Plains: FACW (taxonomic split from wetland indicator species)
• Midwest: FACW (taxonomic split from wetland indicator species)
• Northcentral & Northeast: FACW (taxonomic split from wetland indicator species)

Heliophily ⓘ: 5