Muhlenbergia mexicana (Linnaeus) Trinius. Hairy Wirestem Muhly. Phen: Sep-Oct. Hab: Mafic and calcareous fens, seeps, dry rocky woodlands, barrens, outcrops, and disturbed areas, usually over mafic or calcareous substrates. Dist: The epithet is something of a misnomer; the species is largely northern, occurring from NS, ON, MB, SK, and YT, south to NC, TN, AR, TX, NM, AZ, CA, and Mexico (CHH, DGO, NLE).

Origin/Endemic status: Native

Synonymy: = C, F, G, HC, K1, K3, K4, Mex, Mi, Mo1, NcTx, NE, NY, Pa, RAB, S13, Va, W, WV; = Muhlenbergia foliosa (Roem. & Schult.) Trin. – S; = n/a – Tat; > Muhlenbergia mexicana (L.) Trin. var. filiformis (Torr.) Scribn. – FNA25, Il; > Muhlenbergia mexicana (L.) Trin. var. mexicana – FNA25, Il

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Wetland Indicator Status:

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

Heliophily ?: 8