Malaxis bayardii Fernald. Appalachian Adder's-mouth. Phen: Jul-Sep. Hab: Dry, open, upland forests, shale barrens. Dist: S. NY and se. MA south through CT, RI, NJ, PA, and VA to w. and c. NC, mostly in the mountains (but somewhat disjunct on the Coastal Plain of VA).

Origin/Endemic status: Native

Taxonomy Comments: See Catling (1991) for further discussion of the distinction of M bayardii from M. unifolia.

Synonymy: = F, FNA26, K1, K3, K4, NE, NY, Pa, Va, Catling (1991); < Malaxis unifolia Michx. – C, G, GW1, RAB, S, S13, W, WV, Correll (1950), Luer (1975)

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Wetland Indicator Status:

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

Heliophily: 2